• Ada
• Agda
• Alef
• Android
• APL
• Arduino
• ASP.NET MVC
• Assembly Language
  • Non-X86
• AutoHotkey
• Autotools
• Awk
• Bash
• Basic
• BETA
• C
• C#
• C++
• Chapel
• Cilk
• Clojure
• COBOL
• CoffeeScript
• ColdFusion
• Cool
• Coq
• D
• Dart
• DB2
• Delphi / Pascal
• DTrace
• Elasticsearch
• Emacs
• Erlang
• F#
• Firefox OS
• Flex
• Force.com
• Forth
• Fortran
• FreeBSD
• Git
• Go
• Groovy
  • Gradle
  • Grails
  • Spock Framework
• Graphical user interfaces
• Graphics Programming
• Hadoop
• Haskell
• HTML / CSS
  • Bootstrap
• Icon
• IDL
• iOS
• Isabelle/HOL
• J
• Java
  • Spring
  • Spring Boot
  • Spring Security
  • Wicket
• JavaScript
  • Javascript frameworks
  • Node.js
• Jenkins
• Language Agnostic
  • Algorithms & Datastructures
  • Cellular Automata
  • Cloud Computing
  • Compiler Design
  • Database
  • Datamining
  • Information Retrieval
  • Licensing
  • Machine Learning
  • Mathematics
  • Misc
  • MOOC
  • Networking
  • Open Source Ecosystem
  • Operating systems
  • Parallel Programming
  • Partial Evaluation
  • Professional Development
  • Programming Paradigms
  • Regular Expressions
  • Reverse Engineering
  • Security
  • Software Architecture
  • Standards
  • Theoretical Computer Science
  • Web Performance
• LaTeX
• Limbo
• Linux
• Lisp
• Lua
• MarkDown
• Mathematica
• MATLAB
• Maven
• Mercurial
• Mercury
• Meta-Lists
• MySQL
• .NET Framework
• Neo4J
• NoSQL
• Oberon
• Objective-C
• OCaml
• Octave
• OpenGL ES
• OpenMP
• OpenSCAD
• Oracle PL/SQL
• Oracle Server
• Parrot / Perl 6
• PC-BSD
• Perl
• PHP
• PicoLisp
• PostgreSQL
• PowerShell
• Processing
• Prolog
  • Constraint Logic Programming
• PureScript
• Python
  • Django
  • Flask
  • Kivy
  • Pandas
  • Pyramid
• QML
• R
• Racket
• REBOL
• Ruby
  • RSpec
  • Sinatra
  • Ruby on Rails
• Rust
• Sage
• Scala
  • Lift
  • Play Scala
• Scheme
• Scilab
• Scratch
• Sed
• Silverlight
• Smalltalk
• SQL (implementation agnostic)
• SQL Server
• Swift
• Standard ML
• Subversion
• Tcl
• Teradata
• TeX
• Tizen
• TLA
• TypeScript
• Unix
• Verilog
• VHDL
• Vim
• Visual Basic
• Visual Prolog
• Web Services
• Windows 8
• Windows Phone
• Workflow
• xBase (dBase / Clipper / Harbour)

Meta-Lists

• 25 Free Computer Science Ebooks
• atariarchives.org atariarchives.org makes books, information, and software for Atari and other classic computers available on the Web.
• Bento
• Bitsavers.org
• Bookboon: IT & Programming
• Codingus
• Cheat Sheets (Free)
• Free Smalltalk Books, collected by Stéphane Ducasse
• Free Tech Books
• Hacker Shelf
• IBM Redbooks
• InfoQ Minibooks
• InTech: Computer and Information Science
• JSBooks - directory of free javascript ebooks
• Learn X in Y minutes
• Microsoft Press: Free E-Books
• Microsoft Technologies 1, including books on Windows Azure, SharePoint, Visual Studio Guide, Windows phone development, ASP.net, Office365, etc. collection by Eric Ligman
• Microsoft Technologies 2, including books on Windows Azure, SharePoint, Visual Studio Guide, Windows phone development, ASP.net, etc. collection by Eric Ligman
• MindView Inc
• O'Reilly's Commons
• O'Reilly's Open Books Project
• Stef's Free Online Smalltalk Books
• TechBooksForFree.com
• Theassayer.org
• tutorialspoint
• Wikibooks: Programming
• Red Gate Books

Graphics Programming

• Blender 3D: Noob to Pro
• DirectX manual (draft)
• GPU Gems
• GPU Gems 2 - ch 8,14,18,29,30 as pdf
• GPU Gems 3
• Graphics Programming Black Book
• Grokking the GIMP
• Introduction to Modern OpenGL
• Learning Modern 3D Graphics Programming (draft)
• OpenGL Programming Guide (The Red Book)
• ShaderX series
• Tutorials for modern OpenGL

Graphical User Interfaces

• Best of Smashing Magazine
• How to Design Faceted Search: The Complete Guide to Designing Faceted Search User Interface - Abhijit Rawool
• Programming with gtkmm 3
• Search User Interfaces - Marti A. Hearst
• Working through Screens - Jacob Burghardt

Language Agnostic

Algorithms & Data Structures

• A Field Guide To Genetic Programming
• Algorithmic Graph Theory
• Algorithms - Dasgupta, Papadimitriou, Vazirani (PDFs)
• Algorithms, 4th Edition - Robert Sedgewick and Kevin Wayne
• Algorithms and Automatic Computing Machines (1963) - B. A. Trakhtenbrot
• Algorithms and Complexity (PDF)
• Algorithms and Data-Structures (PDF)
• Algorithms Course Materials - Jeff Erickson
• Algorithms for Programmers: Ideas and Source Code (PDF)
• Binary Trees (PDF)
• Clever Algorithms
• Data Structures and Algorithms: Annotated Reference with Examples
• Data Structures Succinctly Part 1, Syncfusion (PDF, Kindle)(Just fill the fields with any values)
• Data Structures Succinctly Part 2, Syncfusion (PDF, Kindle)(Just fill the fields with any values)
• Foundations of Computer Science - Al Aho and Jeff Ullman
• Open Data Structures: An Introduction - Pat Morin
• LEDA: A Platform for Combinatorial and Geometric Computing
• Lectures Notes on Algorithm Analysis and Computational Complexity (Fourth Edition), University of North Texas (PDF)
• Linked List Basics (PDF)
• Linked List Problems (PDF)
• Mastering Algorithms with C (PDF)
• Matters Computational
• Planning Algorithms
• Problems on Algorithms (Second Edition), University of North Texas (PDF)
• Programming Pearls - Jon Bentley
• Purely Functional Data Structures (PDF)
• Sequential and parallel sorting algorithms
• Text Algorithms (PDF)
• The Algorithm Design Manual
• The Art of Computer Programming (fascicles, mostly volume 4) - Donald Knuth
• The Design of Approximation Algorithms (PDF)
• The Great Tree List Recursion Problem (PDF)
• Think Complexity (PDF)

Cellular Automata

• Cellular Automata Books
• A New Kind of Science - Stephen Wolfram

Cloud Computing

• Multi-tenant Applications for the Cloud, 3rd Edition
• OpenStack Operations Guide

Compiler Design

• Basics of Compiler Design (Anniversary Edition) - Torben Mogensen
• Compilers and Compiler Generators: An Introduction with C++ - P. D. Terry
• Compiler Construction (PDF)
• Compiler Design: Theory, Tools, and Examples, C/C++ Edition - Seth D. Bergmann
• Compiler Design: Theory, Tools, and Examples, Java Edition - Seth D. Bergmann
• Compiling Scala for the Java Virtual Machine - Michel Schinz
• Compiling Techniques - F.R.A. Hopgood, Macdonald, 1969
• Implementing Functional Languages: A Tutorial - Simon Peyton Jones, David Lester
• Let's Build a Compiler (PDF)
• Linkers and Loaders - John R. Levine
• Practical and Theoretical Aspects of Compiler Construction (class lectures and slides)

Database

• Big Data Now: Current Perspectives from O'Reilly Radar
• Database Fundamentals (PDF)
• Foundations of Databases
• Temporal Database Management - Christian S. Jensen
• The Theory of Relational Databases

Datamining

• A Programmer's Guide to Data Mining (Draft) - Ron Zacharski
• Data Jujitsu: The Art of Turning Data into Product(Just fill the fields with any values)
• Data Mining Algorithms In R
• Internet Advertising: An Interplay among Advertisers, Online Publishers, Ad Exchanges and Web Users (PDF)
• Introduction to Data Science - Jeffrey Stanton
• Mining of Massive Datasets
• School of Data Handbook
• Theory and Applications for Advanced Text Mining

Information Retrieval

• Introduction to Information Retrieval
• Information Retrieval: A Survey (PDF)
• Practical Semantic Web and Linked Data Applications: Common Lisp Edition - Mark Watson
• Practical Semantic Web and Linked Data Applications: Java, JRuby, Scala, and Clojure Edition - Mark Watson

Licensing

• Creative Commons: a user guide - Simone Aliprandi
• The Public Domain: Enclosing the Commons of the Mind - James Boyle

Machine Learning

• A Course in Machine Learning (PDF)
• A First Encounter with Machine Learning (PDF)
• AI Algorithms, Data Structures, and Idioms in Prolog, Lisp, and Java - George F. Luger, William A Stubblefield
• An Introduction to Statistical Learning - Gareth James, Daniela Witten, Trevor Hastie and Robert Tibshirani
• Artificial Intelligence | Machine Learning - Andrew Ng(Notes, lectures, and problems)
• Artificial Intelligence A Modern Approach (PDF)
• Bayesian Reasoning and Machine Learning
• Computer Vision: Algorithms and Applications
• Gaussian Processes for Machine Learning
• Inductive Logic Programming
• Information Theory, Inference, and Learning Algorithms
• Introduction to Machine Learning - Alex Smola and S.V.N. Vishwanathan (PDF)
• Introduction to Machine Learning - Amnon Shashua
• Learning Deep Architectures for AI (PDF)
• Machine Learning
• Machine Learning, Neural and Statistical Classification (PDF) oronline version - This book is based on the EC (ESPRIT) project StatLog.
• Neural Networks and Deep Learning
• Probabilistic Models in the Study of Language (Draft, with R code)
• Programming Computer Vision with Python - Jan Erik Solem
• Reinforcement Learning: An Introduction
• The Elements of Statistical Learning - Trevor Hastie, Robert Tibshirani, and Jerome Friedman
• The LION Way: Machine Learning plus Intelligent Optimization
• The Python Game Book

Mathematics

• A First Course in Linear Algebra - Robert A. Beezer
• Bayesian Methods for Hackers - Cameron Davidson-Pilon
• CK-12 Probability and Statistics - Advanced
• Calculus Made Easy (PDF) - Silvanus P. Thompson
• Collaborative Statistics
• Concepts & Applications of Inferential Statistics
• Differential Equations - Paul Dawkins
• Elementary Differential Equations - William F. Trench
• Essentials of Metaheuristics by Sean Luke
• Introduction to Probability - Charles M. Grinstead and J. Laurie Snell
• Introduction to Statistical Thought - Michael Lavine
• Linear Algebra
• Linear Algebra, Theory And Applications - Kenneth Kuttler
• Linear Algebra Done Wrong - Sergei Treil
• Linear Algebra: An Introduction to Mathematical Discourse - Jim Hefferon
• Mathematical Logic - an Introduction (PDF)
• Mathematics for Computer Science (November 2013 Version) (PDF) - Eric Lehman
• Notes on Differential Equations - Robert E. Terrell
• Number Theory (PDF)
• OpenIntro Statistics
• Ordinary Differential Equations
• Power Programming with Mathematica - David B. Wagner
• Probability and Statistics Cookbook
• Probability and Statistics EBook
• Statistics Done Wrong - Alex Reinhart
• Think Bayes: Bayesian Statistics Made Simple - Allen B. Downey
• Think Stats: Probability and Statistics for Programmers (code written in Python) - Allen B. Downey

Misc

• 97 Things Every Programmer Should Know
• 97 Things Every Programmer Should Know - Extended
• A Mathematical Theory of Communication by Claude E.Shannon
• Asterisk™: The Definitive Guide
• Barcode Overview
• Come, Let's Play: Scenario-Based Programming Using Live Sequence Charts
• Communicating Sequential Processes (PDF) by Tony Hoare
• Computer Musings (lectures by Donald Knuth)
• Culture & Empire: Digital Revolution (PDF)
• Data-Intensive Text Processing with MapReduce (PDF)
• Designing Interfaces by Jennifer Tidwell
• DevDocs - Documents for Developers in 1 place
• DevOps For Dummies (IBM Edition) (PDF)
• Digital Signal Processing For Engineers and Scientists
• Digital Signal Processing For Communications
• Distributed systems for fun and profit
• "DYNAMIC LINKED LIBRARIES": Paradigms of the GPL license in contemporary software - Luis A. Enríquez
• Flow based Programming
• Foundations of Programming
• Getting Real
• Hacknot: Essays on Software Development - Ed Johnson
• How Computers Work
• How to Become a Programmer
• How to Think Like a Computer Scientist - Peter Wentworth, Jeffrey Elkner, Allen B. Downey, and Chris Meyers
• I Am a Bug
• Learn to Program
• Learning 30 Technologies in 30 Days: A Developer Challenge - Shekhar Gulati
• Linked Data Patterns: A pattern catalogue for modelling, publishing, and consuming Linked Data - Leigh Dodds, Ian Davis
• Magic Ink: Information Software and The Graphical Interface by Bret Victor
• Mobile Developer's Guide to the Galaxy
• Modeling Reactive Systems with Statecharts
• Mother Tongues of Computer Languages (PNG)
• Networks, Crowds, and Markets: Reasoning About a Highly Connected World
• Open Government;Collaboration, Transparency, and Participation in Practice
• Object-Oriented Reengineering Patterns - Serge Demeyer, Stéphane Ducasse and Oscar Nierstrasz
• PDQ: Pretty Darn Quick: An Agile, All-Purpose Methodology - Jeff Franz-Lien
• PNG: The Definitive Guide
• Pointers And Memory (PDF)
• Programmer's Motivation for Beginners
• Programming with Unicode
• Project Oberon (PDF)
• Record-Playback Test Automation: Sahi & Selenium IDE: Critical Evaluation of Record-Playback Automation Tools - Shashikant Jagtap
• Security Engineering
• Small Memory Software
• The Quest for Artificial Intelligence: A History of Ideas and Achievements - Nils J. Nilsson
• The Z Notation: A Reference Manual, Second Edition - J. M. Spivey

MOOC

• edX
• Coursera
• MIT OCW
• Udacity
• FutureLearn

Networking

• 802.11ac: A Survival Guide - Matthew Gast
• Code Connected vol.1 (PDF) (book on ZeroMQ)
• HTTP Succinctly, Syncfusion (PDF, Kindle)(Just fill the fields with any values)
• High-Performance Browser Networking
• The TCP/IP Guide
• Understanding IP Addressing: Everything you ever wanted to know (PDF)
• ZeroMQ Guide

Open Source Ecosystem

• Data Journalism Handbook
• Free Software, Free Society
• Free as in Freedom (PDF)
• Getting started with Open source development (PDF)
• How to get started with open source (ePub & ODT)
• Innovation Happens Elsewhere
• Open Advice: FOSS: What We Wish We Had Known When We Started
• Producing Open Source Software
• The Architecture of Open Source Applications: Vol. 1: Elegance, Evolution, and a Few Fearless Hacks; Vol. 2: Structure, Scale, and a Few More Feerless Hacks
• The Cathedral and the Bazaar - Eric S. Raymond
• The Future of the Internet
• The Performance of Open Source Applications
• The Wealth of Networks: How Social Production Transforms Markets and Freedom - Yochai Benkler

Operating systems

• How to Make a Computer Operating System (Work in Progress)
• Operating Systems and Middleware (PDF and LaTeX)
• Operating Systems: Three Easy Pieces (PDF)
• Practical File System Design:The Be File System (PDF) - Dominic Giampaolo
• The Art of Unix Programming - Eric S. Raymond
• The Little Book of Semaphores - Allen B. Downey
• Think OS: A Brief Introduction to Operating Systems (PDF) - Allen B. Downey
• UNIX Application and System Programming, lecture notes (PDFs) - Prof. Stewart Weiss
• Xv6, a simple Unix-like teaching operating system (PDF)

Parallel Programming

• High Performance Computing (PDF, ePUB) - Charles Severance & Kevin Dowd
• High Performance Computing Training (LLNL materials)
• High-Performance Scientific Computing (class lectures and slides)
• How to Write Parallel Programs
• Introduction to High-Performance Scientific Computing - Victor Eijkhout
• Introduction to Parallel Computing - Blaise Barney
• Is Parallel Programming Hard, And, If So, What Can You Do About It? - Paul E. McKenney
• Programming on Parallel Machines; GPU, Multicore, Clusters and More - Norm Matloff
• The OpenCL Programming Book

Partial Evaluation

• Partial Evaluation and Automatic Program Generation - (PDF) Jones, Gomard and Sestoft

Professional Development

• Apprenticeship Patterns: Guidance for the Aspiring Software Craftsman - David H. Hoover and Adewale Oshineye
• Confessions of an IT Manager(RedGate, By Phil Factor)
• Don't Just Roll the Dice (PDF)(RedGate, By Neil Davidson)
• How to be a Programmer: A Short, Comprehensive, and Personal Summary by Robert L. Read
• How to Do What You Love & Earn What You’re Worth as a Programmer(Leanpub, By Reginald Braithwaite)
• What I've Learned From Failure(Leanpub, By Reginald Braithwaite)
• Why programmers work at night(Leanpub, By Swizec Teller)

Programming Paradigms

• Introduction to Functional Programming (class lectures and slides)
• Type Theory and Functional Programming

Regular Expressions

• Learn Regex The Hard Way - Zed. A. Shaw
• The Bastards Book of Regular Expressions: Finding Patterns in Everyday Text - Dan Nguyen

Reverse Engineering

• Hacking the Xbox: An Introduction to Reverse Engineering - Andrew "bunnie" Huang

Security

• Crypto 101 - Crypto for everyone
• Handbook of Applied Cryptography
• How to deal with Passwords
• Intrusion Detection Systems with Snort
• OWASP Top 10 for .NET Developers
• Security Engineering

Software Architecture

• Architectural Styles and the Design of Network-based Software Architectures - Roy Thomas Fielding
• Best Kept Secrets of Peer Code Review
• Data-Oriented Design
• Domain Driven Design Quickly
• Don't Just Roll the Dice
• DSL Engineering: Designing, Implementing and Using Domain-Specific Languages - Markus Voelter
• Essential Skills for Agile Development
• Guide to the Software Engineering Body of Knowledge
• How to Design Programs
• How to Write Unmaintainable Code
• Kanban and Scrum - making the most of both
• Kanban for skeptics (Leanpub, by Nick Oostvogels)
• Methods and Techniques for the Design and Implementation of Domain-Specific Languages - Zef Hemel
• Naked objects - Richard Pawson
• NASA Manager Handbook for Software Development (PDF)
• NASA Software Measurement Handbook
• OAuth - The Big Picture
• Object-Oriented Reengineering Patterns
• Patterns and Practices: Application Architecture Guide 2.0
• Patterns of Software: Tales from the Software Community (PDF)
• Practicing Domain-Driven Design - Scott Millett
• Programming Reliable Systems (Joe Armstrong's PhD thesis) (PDF)
• Scrum and XP from the Trenches
• Seamless Object-Oriented Software Architecture (PDF)
• Software Architecture (PDF)
• Software Engineering for Internet Applications
• Web API Design
• Your API Is Bad(Leanpub, by Paddy Foran)

Standards

• UNIX - The POSIX Standard - IEEE Std 1003.1

Theoretical Computer Science

• An Introduction to the Theory of Computation
• Building Blocks for Theoretical Computer Science - Margaret M. Fleck
• Category Theory for Computing Science (PDF)
• Homotopy Type Theory: Univalent Foundations of Mathematics (PDF)
• Introduction to Computing
• Introduction to Theory of Computation (PDF) - Anil Maheshwari and Michiel Smid
• Models of Computation - John E. Savage
• Network Science
• Practical Foundations for Programming Languages, Preview - Robert Harper
• Principles of Programming Languages - Scott F. Smith
• Programming in Martin-Löf's Type Theory - Bengt Nordstroem
• Programming Languages: Application and Interpretation (2nd Edition)
• Structure and Interpretation of Computer Programs
• Think Complexity - Allen B. Downey

Web Performance

• Book of Speed by Stoyan Stefanov
• Mature Optimization by Carlos Bueno

Ada

• A Guide to Ada for C and C++ Programmers (PDF)
• Ada Distilled (PDF)
• Ada for Software Engineers (PDF)
• The Big Online Book of Linux Ada Programming
• Ada Programming
• Ada Reference Manual - ISO/IEC 8652:2012(E) Language and Standard Libraries (PDF)

Agda

• Agda Tutorial

Alef

• Alef Language Reference Manual

Android

• Android 4 App Development Essentials
• Android Programming Guide for Beginners (PDF - need email confirmation)
• CodePath Android Cliffnotes
• Coreservlets Android Programming Tutorial
• Expert Android and Eclipse development knowledge
• Google Android Developer Training
• Styling Android
• TechnoTalkative Android
• Android Programming Succinctly, Syncfusion (PDF,Kindle)(Just fill the fields with any values)

APL

• A Practical Introduction to APL1 & APL2
• A Practical Introduction to APL3 & APL4
• Mastering Dyalog APL (PDF)

Arduino

• Arduino Programming Notebook - Brian Evans
• Introduction to Arduino

ASP.NET MVC

• ASP.NET MVC Music Store

Assembly Language

• An introduction to reverse engineering for beginners
• Assembly Language Succinctly
• Introduction to Reverse Engineering Software
• Paul Carter's Tutorial on x86 Assembly
• PC Assembly Language - Paul A. Carter
• Professional Assembly Language (PDF)
• Programming from the Ground Up (PDF)
• Ralf Brown's Interrupt List
• Software optimization resources by Agner Fog
• The Art of Assembly Language Programming
• The Second Book Of Machine Language
• Wizard Code
• x86 Assembly

Non-X86

• Easy 6502 - Nick Morgan
• Machine Code for Beginners (PDF) by Lisa Watts and Mike Wharton [Z80 and 6502 CPUs]
• Machine Language for Beginners by Richard Mansfield [6502 CPU]
• Programmed Introduction to MIPS Assembly Language

AutoHotkey

• AHKbook - the book for AutoHotkey

Autotools

• Autotools Mythbuster
• GNU Autoconf, Automake and Libtool

Awk

• A User's Guide for GNU AWK
• Awk - Bruce Barnett
• An Awk Primer

Bash

• Advanced Bash-Scripting Guide
• Bash Guide for Beginners by Machtelt Garrels
• BASH Programming- Mike G mikkey
• Getting Started with BASH
• Google Shell Style Guide
• Lhunath's Bash Guide
• The Command Line Crash Course (also a Powershell reference)
• Conquering the Command Line - Mark Bates

Basic

• 10 PRINT CHR$(205.5+RND(1)); : GOTO 10 - Nick Montfort, Patsy Baudoin, John Bell,Ian Bogost, Jeremy Douglass, Mark C. Marino, Michael Mateas, Casey Reas, Mark Sample, Noah Vawter
• A beginner's guide to Gambas
• BASIC programming language - Wikibooks
• How To Gambas3 Guides
• Visual Basic Essentials

BETA

• Object-Oriented Programming in the BETA Programming Language - Ole Lehrmann Madsen, Birger Møller-Pedersen, Kristen Nygaard

C

• A Tutorial on Pointers and Arrays in C
• Advanced Linux Programming
• Beej's Guide to C Programming
• Beej's Guide to Network Programming
• Build Your Own Lisp
• C Programming - Wikibooks
• Deep C
• Essential C (PDF)
• TONC GBA Programming - Game Boy Advance Development
• Learn C the hard way
• Object Oriented Programming in C (PDF)
• The C book
• The Craft of Text Editing or A Cookbook for an Emacs - Craig A. Finseth
• The New C Standard - An Annotated Reference
• Using C on the UNIX System - David A. Curry

C Sharp

• C# Essentials
• C# Programming - Wikibook
• C# Yellow Book (intro to programming)
• Data Structures and Algorithms with Object-Oriented Design Patterns in C#
• Fundamentals of Computer Programming with C# - Svetlin Nakov
• HTTP Programming Recipes for C# Bots
• Threading in C#

C++

• C++ Annotations
• C++ Cookbook (PDF)
• C++ GUI Programming With Qt 3
• C++ Succinctly, Syncfusion (PDF, Kindle)(Just fill the fields with any values)
• CS106X Programming Abstractions in C++
• Data Structures and Algorithms with Object-Oriented Design Patterns in C++
• Financial Numerical Recipes in C++ - Bernt Arne Ødegaard
• Game Programming Patterns
• Google's C++ Style Guide
• How To Think Like a Computer Scientist: C++ Version - Allen B. Downey
• Introduction to Design Patterns in C++ with Qt
• Learn C++. (PDF, Online)
• Matters Computational: Ideas, Algorithms, Source Code, by Jorg Arndt (PDF)
• Open Data Structures (In C++) (PDF)
• Software Design Using C++ - Br. David Carlson and Br. Isidore Minerd
• Software optimization resources by Agner Fog
• The Boost C++ libraries
• The Rook's Guide to C++ (PDF)
• Thinking in C++, Second Edition, Vol. 1.(Vol. 2) - Bruce Eckel
• Also see: The Definitive C++ Book Guide and List

Chapel

• Chapel Tutorial
• Chapel Tutorial for Programmers

Cilk

• Cilk 5.4.6 Reference Manual (PDF)

Clojure

• A Brief Beginner’s Guide To Clojure
• Clojure - Functional Programming for the JVM
• Clojure Cheat Sheet
• Clojure Cookbook
• Clojure for the Brave and True
• Clojure in Small Pieces - Rich Hickey
• Clojure Koans
• Clojure Programming
• ClojureScript Koans
• Data Sorcery with Clojure
• Modern cljs
• The Clojure Style Guide

COBOL

• COBOL Programming Fundamental (PDF)
• OpenCOBOL 1.1 - Programmer's Guide (PDF)

CoffeeScript

• CoffeeScript Ristretto
• Smooth CoffeeScript
• The Little Book on CoffeeScript

ColdFusion

• CFML In 100 Minutes
• Learn CF in a Week

Cool

• CoolAid: The Cool 2013 Reference Manual (PDF)

Coq

• Software Foundations
• Certified Programming with Dependent Types

D

• D Templates Tutorial
• Programming in D

Dart

• What is Dart?

DB2

• Getting started with DB2 Express-C (PDF)
• Getting started with IBM Data Studio for DB2 (PDF)
• Getting started with IBM DB2 development (PDF)

Delphi / Pascal

• Essential Pascal Version 1 and 2

DTrace

• IllumOS Dynamic Tracing Guide

Elasticsearch

• Exploring Elasticsearch
• Elasticsearch: The Definitive Guide (fork it on GH)

Emacs

• An Introduction to Programming in Emacs Lisp, 3rd Edition
• GNU Emacs Lisp Reference Manual
• GNU Emacs Manual, 17th Edition, v. 24.2

Erlang

• Concurrent Programming in ERLANG
• Erlang Handbook (PDF)
• Études for Erlang - J. David Eisenberg
• Learn You Some Erlang For Great Good - Frederic Trottier-Hebert

F Sharp

• F# Succinctly, SyncFusion (PDF, Kindle)(Just fill the fields with any values)
• F# Programming in Wikibooks
• Programming Language Concepts for Software Developers (PDF)
• Real World Functional Programming (MSDN Chapters)

Flex

• Adobe Flex 2, Programming Actionscript 3.0 (PDF)
• Getting started with Adobe Flex (PDF)

Firefox OS

• Quick Guide For Firefox OS App Development: Creating HTML5 based apps for Firefox OS - Andre Garzia

Force.com

• Analytics Workbook
• Apex Design Patterns and Best Practices
• Apex Workbook
• Cloud Flow Designer Workbook
• Database.com Workbook
• Force.com Fundamentals
• Force.com Integration Workbook
• Force.com Platform Fundamentals: An Introduction to Custom Application Development in the Cloud

• Force.com Workbook

• Heroku Postgres (PDF)

• ISVForce Workbook
• Security Workbook
• Service Cloud Workbook
• Site.com Workbook
• Visualforce Workbook

Forth

• A Beginner's Guide to Forth
• And so Forth... (PDF)
• Programming Forth (PDF)
• Starting Forth
• Thinking Forth
• Thoughtful Programming and Forth

Fortran

• Fortran programming language - Wikibooks
• Introduction to fortran 95 and numerical computing: a jump-start for scientists and engineers

FreeBSD

• Books and Articles from FreeBSD Site
• The Complete FreeBSD

Git

• A Visual Git Reference - Mark Lodato
• Conversational Git
• Git From The Bottom Up (PDF)
• Git Immersion
• Git internals - Scott Chacon (PDF)
• GitHub Cheat Sheet - Tim Green (Markdown)
• Git In The Trenches
• Git Magic
• Git Pocket Guide - Richard E. Silverman
• Git Reference
• Git Succinctly, Syncfusion (PDF, Kindle)(Just fill the fields with any values)
• git - the simple guide
• Git Workflows
• Learn Git - Learn Version Control with Git - Tobias Günther
• Pro Git - Scott Chacon
• Pro Git Reedited - Jon Forrest
• Think Like (a) Git: A Guide for the Perplexed
• Version Control by Example (Mercurial, Subversion, Verasity)

Go

• An Introduction to Programming in Go
• Build Web Application with Golang
• Go Bootcamp - Matt Aimonetti
• Go by Example
• Learning Go
• Network programming with Go
• Practical Cryptography With Go
• The Go Tutorial
• Let's learn Go!

Groovy

Gradle

• Gradle User Guide (PDF) - Hans Dockter, Adam Murdoch
• Building Java Projects with Gradle
• Building and Testing with Gradle

Grails

• The Grails Framework - Reference Documentation (PDF) - Graeme Rocher, Peter Ledbrook, Marc Palmer, Jeff Brown, Luke Daley, Burt Beckwith, Lari Hotari
• Grails Tutorial for Beginners - GRAILS COOKBOOK
• Getting Started with Grails

Spock Framework

• Spock Framework Reference Documentation - Peter Niederwieser
• Spock Intro - Ed Gibbs

Hadoop

• Hadoop Illuminated - Mark Kerzner & Sujee Maniyam
• Programming Pig - Alan Gates

Haskell

• A Gentle Introduction to Haskell
• A Haskell School of Music (PDF) (work in progress)
• Anatomy of Programming Languages - William R. Cook
• Beautiful Code, Compelling Evidence (PDF)
• Exploring Generic Haskell - Andres Löh
• Haskell and Yesod
• Haskell no panic
• Haskell web Programming (Yesod tutorial)
• Learn Haskell Fast and Hard
• Learn You a Haskell for Great Good - Miran Lipovaca
• Natural Language Processing for the Working Programmer
• Parallel and Concurrent Programming in Haskell - Simon Marlow
• Real World Haskell
• Speeding Through Haskell
• The Haskell Road to Logic, Math and Programming (PDF)
• Wikibook Haskell
• Yet Another Haskell Tutorial (PDF)

HTML / CSS

• A beginner's guide to HTML&CSS
• An advanced guide to HTML&CSS
• Code Guide: Standards for developing flexible, durable, and sustainable HTML and CSS - Mark Otto
• Dive Into HTML5 (PDF) - Mark Pilgrim
• GA Dash
• Google's HTML/CSS Style Guide
• HTML Canvas Deep Dive - Josh Marinacci
• HTML Dog Tutorials
• HTML5 Canvas - Steve Fulton & Jeff Fulton
• HTML5 for Publishers - Sanders Kleinfeld
• HTML5 For Web Designers - Jeremy Keith
• Learn CSS Layout
• Scalable and Modular Architecture for CSS - Jonathan Snook
• Web Audio API - Boris Smus

Bootstrap

• Twitter Bootstrap Succinctly (PDF, Kindle)(Just fill the fields with any values)

Icon

• The Implementation of the Icon Programming Language

IDL

• Getting Started with IDL
• Guide to Using IDL for Astronomers

iOS

• Cocoa Dev Central
• iOS Succinctly, Syncfusion (PDF, Kindle)(Just fill the fields with any values)
• Start Developing iOS Apps Today (PDF)

Isabelle/HOL

• Concrete Semantics - A Proof Assistant Approach by Tobias Nipkow and Gerwin Klein (PDF)
• Isabelle/HOL - A Proof Assistant for Higher-Order Logic by Tobias Nipkow and Lawrence C. Paulson and Markus Wenzel (PDF)

J

• Arithmetic by Kenneth E Iverson (PDF)
• Brief Reference by Chris Burke and Clifford Reiter (PDF)
• Calculus by Kenneth E Iverson (PDF)
• Concrete Math Companion by Kenneth E Iverson (PDF)
• Computers and Mathematical Notation by Kenneth E Iverson
• Easy J by Linda Alvord, Norman Thomson (PDF) ||Word DOC
• Exploring Math by Kenneth E Iverson (PDF)
• J for C Programmers by Henry Rich- online ||pdf || word 2003 file
• J Primer
• J Reference Card (PDF)
• Learning J by Roger Stokes- online
• Math for the Layman by Kenneth E Iverson (zipped html+images)

Java

• 3D Programming in Java - Daniel Selman
• Agile Java - Jeff Langr
• Animation/Games in Java
• Apache Jakarta Commons: Reusable Java Components - Will Iverson
• Artificial Intelligence - Foundation of Computational Agents
• Category wise tutorials - J2EE
• Core Servlets and JavaServer Pages - Marty Hall and Larry Brown
• Data Structures and Algorithms with Object-Oriented Design Patterns in Java
• Google's Java Style Guide
• Hibernate 4 Example Programs - L. Mohan Arun
• HTTP Programming Recipes for Java Bots
• Introduction to Computer science using Java
• Introduction to Neural Networks with Java
• Introduction to Programming in Java - Robert Sedgewick and Kevin Wayne
• Introduction to Programming Using Java - David J. Eck
• JAAS in Action
• Java Application Development on Linux by Carl Albing and Michael Schwarz (PDF) (PDF)
• Java for the Beginning Programmer
• Java Programming for Kids, Parents and Grandparents - Yakov Fain
• Java Thin-Client Programming
• Java: A Beginner's Guide - Oracle
• Learning Java (4th Edition) - Patrick Niemeyer
• OOP - Learn Object Oriented Thinking & Programming - Rudolf Pecinovsky
• Open Data Structures (in Java) (PDF)
• OSGi in Practice (PDF)
• Practical Artificial Intelligence Programming With Java, Third Edition - Mark Watson
• Processing XML with Java (A Guide to SAX, DOM, JDOM, JAXP, and TrAX) - Elliotte Rusty Harold
• Sun's Java Tutorials
• The ABC of PDF with iText: PDF Syntax essentials
• The Java EE6 Tutorial (PDF)
• The Java EE7 Tutorial (PDF)
• The Java Language Specification - James Gosling, Bill Joy, Guy Steele, Gilad Bracha
• The Java Tutorial 4th Edition - Sharon Zakhour, Scott Hommel, Jacob Royal, Isaac Rabinovitch, Tom Risser, Mark Hoeber
• Think Java: How to Think Like a Computer Scientist - Allen B. Downey
• Thinking in Java
• UML For Java Programmers - Robert Cecil Martin
• Welcome to Java for Python Programmers - Brad Miller
• Welcome to the Java Workshop - An Apache Project
• What's New in Java 8 - Adam L. Davis

Spring

• Spring Framework Reference Documentation (PDF) - Rod Johnson, Juergen Hoeller, Keith Donald, Colin Sampaleanu, Rob Harrop, Thomas Risberg, Alef Arendsen, Darren Davison, Dmitriy Kopylenko, Mark Pollack, Thierry Templier, Erwin Vervaet, Portia Tung, Ben Hale, Adrian Colyer, John Lewis, Costin Leau, Mark Fisher, Sam Brannen, Ramnivas Laddad, Arjen Poutsma, Chris Beams, Tareq Abedrabbo, Andy Clement, Dave Syer, Oliver Gierke, Rossen Stoyanchev, Phillip Webb, Rob Winch, Brian Clozel, Stephane Nicoll, Sebastien Deleuze

Spring Boot

• Spring Boot Reference Guide (PDF,EPUB) - Phillip Webb, Dave Syer, Josh Long, Stéphane Nicoll, Rob Winch, Andy Wilkinson, Marcel Overdijk, Christian Dupuis

Spring Security

• Spring Security Reference - Ben Alex, Luke Taylor, Rob Winch

Wicket

• Official Free Online Guide for Apache Wicket framework

JavaScript

• Basic JavaScript for the impatient programmer - Dr. Axel Rauschmayer
• Book of Modern Frontend Tooling
• Crockford's JavaScript - Douglas Crockford
• Dev Docs
• Eloquent JavaScript 2nd edition - Marijn Haverbeke
• Google JavaScript Style Guide
• Human Javascript
• JavaScript Allongé
• JavaScript Bible (PDF)
• JavaScript Enlightenment - Cody Lindley
• JavaScript Essentials
• JavaScript Garden (Maintained by Tim Ruffles)
• JavaScript Patterns Collection - Shi Chuan
• Javascript Succinctly, Syncfusion (PDF, Kindle)(Just fill the fields with any values)
• JavaScript the Right Way
• jQuery Fundamentals (starts with JavaScript basics)
• JS Robots
• Leaflet Tips and Tricks: Interactive Maps Made Easy - Malcolm Maclean
• Learn to Code JavaScript by Playing a Game
• Learning JavaScript Design Patterns - Addy Osmani
• Developing Backbone.js Applications - Addy Osmani
• Managing Space and Time with JavaScript - Book 1: The Basics - Noel Rappin
• Marionette Exposé: Learn to write modular Javascript applicatons using Backbone Marionette and RequireJS/AMD - Jack Killilea
• Mozilla Developer Network's JavaScript Guide
• Oh My JS(Leanpub, by Azat Mardanov)
• O'Reilly Programming JavaScript Applications - Early Release
• Patterns For Large-Scale JavaScript Application Architecture - Addy Osmani
• Speaking JavaScript - Dr. Axel Rauschmayer
• The JavaScript Tutorial
• The Problem with Native JavaScript APIs (PDF)
• Understanding ECMAScript 6(Leanpub, by Nicholas C. Zakas)
• You Don't Know JS
• JavaScript Fundamentals, Plus a Dash Of JQuery - for dinner ladies

Javascript Frameworks

For resources on Angular.js, Backbone.js, D3.js, Dojo, Ember.js, Express.js, jQuery, Knockout.js, and any other JS toolkit/framework, please refer toJavascript Frameworks Resources and Tutorials, or to its source filejavascript-frameworks-resources.md.

Node.js

• JavaScript and Node FUNdamentals(Leanpub - by Azat Mardanov)
• Mastering Node.js
• Mixu's Node Book
• Node: Up and Running - Tom Hughes-Croucher
• The Node Beginner Book
• Node.js Succinctly, Syncfusion (PDF, Kindle)(Just fill the fields with any values)

Jenkins

• Jenkins: The Definitive Guide (PDF)

LaTeX

• The Not So Short Introduction to LaTeX (PDF)
• LaTeX Wikibook
• Arbirtrary LaTex Reference

See also TeX

Limbo

• Inferno Programming With Limbo

Linux

• Ad Hoc Data Analysis From The Unix Command Line
• Advanced Linux Programming
• Automated Linux From Scratch
• Beyond Linux From Scratch
• Cross Linux From Scratch
• Getting Started with Ubuntu
• GNU Autoconf, Automake and Libtool
• GTK+/Gnome Application Development
• Hardened Linux From Scratch
• Learning Debian GNU/Linux
• Linux Administrator's Security Guide
• Linux Advanced Routing & Traffic Control HOWTO
• Linux Compute Clusters
• Linux Device Drivers, 2nd Edition
• Linux Device Drivers, Third Edition by Jonathan Corbet, Alessandro Rubini, and Greg Kroah-Hartman
• Linux from Scratch
• Linux Kernel in a Nutshell
• Linux Newbie Administrator Guide
• Linux Security for Beginners
• Programming and Using Linux Sound - in depth
• Red Hat Enterprise Linux 6 Essentials
• Secure Programming for Linux and Unix
• The Debian Administrator's Handbook
• The Linux Command Line (PDF)
• The Linux Development Platform (PDF) (PDF)
• The Linux Kernel Module Programming Guide
• The Linux System Administrator's Guide
• The Python GTK+ 3 Tutorial
• Ubuntu Pocket Guide and Reference
• Ubuntu Server Guide
• Upstart Intro, Cookbook and Best Practises
• What Every Programmer Should Know About Memory (PDF)

Lisp

• Basic Lisp Techniques - David J. Cooper, Jr.
• Casting Spels in Lisp
• Common Lisp Quick Reference
• Common Lisp the Language, 2nd Edition
• Common Lisp: A Gentle Introduction to Symbolic Computation - David S. Touretzky
• Common Lisp: An Interactive Approach - Stuart C. Shapiro
• Google's Common Lisp Style Guide
• Interpreting LISP - Gary D. Knott
• Let Over Lambda - 50 Years of Lisp
• Lisp Hackers: Interviews with 100x More Productive Programmers - Vsevolod Dyomkin
• Lisp Koans
• Lisp Web Tales
• Natural Language Processing in Lisp
• On Lisp
• Practical Common Lisp
• Sketchy LISP - Nils Holm
• Structure and Interpretation of Computer Programs
• Successful Lisp: How to Understand and Use Common Lisp - David Lamkins
• The Evolution of Lisp - Guy L. Steele Jr., Richard P. Gabriel
• Learn Lisp The Hard Way - Colin J.E. Lupton

Lua

• Lua 5.1 Reference Manual
• Programming In Lua (for version 5)
• Programming Gems

Markdown

• Learn Markdown (PDF) (EPUB) (MOBI) - GitBookIO, Sammy P., Aaron O.

Mathematica

• Basics of Algebra, Topology, and Differential Calculus
• Mathematica® programming: an advanced introduction by Leonid Shifrin
• Stephen Wolfram's The Mathematica Book
• Vector Math for 3d Computer Graphics
• Wolfram Mathematica Tutorial Collection

MATLAB

• An Introduction to MATLAB
• Applications of MATLAB in Science and Engineering
• Experiments with MATLAB
• Freshman Engineering Problem Solving with MATLAB
• Interactive Tutorials for MATLAB, Simulink, Signal Processing, Controls, and Computational Mathematics
• MATLAB - A Fundamental Tool for Scientific Computing and Engineering Applications - Volume 1
• MATLAB - A Ubiquitous Tool for the Practical Engineer
• MATLAB Programming
• MATLAB for Engineers: Applications in Control, Electrical Engineering, IT and Robotics
• Numerical Computing with MATLAB
• Physical Modeling in MATLAB - Alan B. Downey

Maven

• Developing with Eclipse and Maven
• Maven by Example
• Maven: The Complete Reference
• Repository Management with Nexus

Mercurial

• HGInit - Mercurial Tutorial by Joel Spolsky
• Mercurial: The Definitive Guide -

Mercury

• The Mercury Users' Guide (PDF)

MySQL

• MySQL Essentials
• MySQL Tutorial Excerpt

.NET Framework

• Charles Petzold's .NET Book Zero
• Entity Framework
• Game Creation with XNA
• Moving to Microsoft Visual Studio 2010
• .NET for Visual FoxPro Developers
• .NET Performance Testing and Optimization - The Complete Guide(RedGate, By Paul Glavich and Chris Farrell)
• Practical Performance Profiling: Improving the efficiency of .NET code(RedGate, By Jean-Philippe Gouigoux)
• Visual Studio .NET Tips and Tricks (VS 2003-2005 only)
• Under the Hood of .NET Memory Management (PDF)(RedGate, By Chris Farrell and Nick Harrison)

Neo4J

• Graph Databases (PDF)

NoSQL

• CouchDB: The Definitive Guide
• Extracting Data from NoSQL Databases: A Step towards Interactive Visual Analysis of NoSQL Data - Petter Nasholm
• Graph Databases
• MongoDB Koans
• NoSQL Databases - Christof Strauch
• The Little MongoDB Book
• The Little Redis Book
• The Little Riak Book
• MongoDB Succinctly, Syncfusion (PDF, Kindle)(Just fill the fields with any values)
• Beginning Titan - The distributed graph database

Oberon

• Object-Oriented Programming in Oberon-2 (PDF)
• Programming in Oberon (PDF)

Objective-C

• Google's Objective-C Style Guide
• Object-Oriented Programming with Objective-C (PDF)
• Objective-C Succinctly, Syncfusion (PDF, Kindle)(Just fill the fields with any values)
• Programming With Objective-C (PDF)
• Try Objective-C Book

OCaml

• Developing Applications With Objective Caml
• Introduction to Objective Caml (PDF)
• Objective Caml for Scientists (first chapter only)
• Real World OCaml
• Think OCaml - Allen B. Downey and Nicholas Monje
• Unix System Programming in OCaml
• Using, Understanding, and Unraveling The OCaml Language: From Practice to Theory and vice versa - Didier Rémy

Octave

• Octave Programming

OpenGL ES

• iPhone 3D Programming - Developing Graphical Applications with OpenGL ES - Philip Rideout

OpenMP

• A Guide To OpenMP (PDF)
• OpenMP Application Programming Interface Standard Version 4.0 (PDF)

OpenSCAD

• OpenSCAD User Manual

Oracle PL/SQL

• PL/SQL Language Reference
• PL/SQL Packages and Types Reference

Oracle Server

• Oracle's Guides and Manuals

Parrot / Perl 6

• Using Perl 6 (work in progress)
• Perl 6 Programming

PC-BSD

• PC-BSD® Users Handbook

Perl

• Beginning Perl
• Data Munging with Perl (PDF)
• The DBIx-Class Book
• Embedding Perl in HTML with Mason
• Essential Perl (PDF)
• Exploring Programming Language Architecture in Perl
• Extreme Perl
• Higher-Order Perl
• Impatient Perl
• Learning Perl The Hard Way
• Mastering Perl - Bryan D Foy
• Modern Perl 5
• Perl 5 Internals
• Perl & LWP
• Perl for the Web
• Perl Training Australia - Course Notes
• Practical mod_perl - Stas Bekman, Eric Cholet
• Plack Handbook
• SDL::Manual Writing Games in Perl
• The PDL Book (PDF)
• Web Client Programming with Perl
• Template Toolkit Documentation

PHP

• CakePHP Framework
  • CakePHP Cookbook 2.x
• Drupal Framework
  • Drupal 7
    • The Tiny Book of Rules (PDF)
    • Master Drupal in 7 hours (PDF)
  • Drupal 8
• Laravel Framework
  • Laravel 4 Official Documentation. Synced Daily
  • Official Documentation (Offline Version)
  • Laravel: Code Bright
• PHP 5 Power Programming
• PHP Best Practices
• PHP Essentials
• PHP Internals Book
• PHP Programming
• PHP Security Guide
• PHP: The Right Way
• Practical PHP Programming (wiki containing O'Reilly'sPHP In a Nutshell)
• Practical PHP Testing
• Symfony2

PicoLisp

• PicoLisp by Example
• PicoLisp Works

PostgreSQL

• Postgres Succinctly (PDF, Kindle)(Just fill the fields with any values)
• Practical PostgreSQL

PowerShell

• Layman’s Guide to PowerShell 2.0 remoting (PDF)
• Mastering PowerShell
• PowerShell 2.0 – One CMDLET At A Time (PDF)
• PowerShell Succinctly, Syncfusion (PDF, Kindle)(Just fill the fields with any values)

Processing

• The Nature of Code: Simulating Natural Systems with Processing

Prolog

• Adventure in Prolog
• Applications of Prolog
• Building Expert Systems in Prolog
• Concise Intro to Prolog
• Introduction to Prolog for Mathematicians
• Learn Prolog Now!
• Logic, Programming and Prolog (2ed)
• Natural Language Processing Techniques in Prolog
• Prolog and Natural-Language Analysis - Fernando C. N. Pereira, Stuart M. Shieber
• Prolog Experiments in Discrete Mathematics, Logic, and Computability - James L. Hein
• Prolog for Programmers
• Prolog Problems - Werner Hett
• Prolog Programming: A First Course - Paul Brna
• Prolog Techniques
• Prolog Tutorial
• Simply Logical
• The First 10 Prolog Programming Contests - Bart Demoen, Phuong-Lan Nguyen, Tom Schrijvers, Remko Tronçon
• Warren's Abstract Machine: A Tutorial Reconstruction - Hassan A¨it-Kaci
• GNU Prolog Manual (PDF)

Constraint Logic Programming (extended Prolog)

• A Gentle Guide to Constraint Logic Programming via ECLiPSe

PureScript

• PureScript By Example - Phil Freeman

Python

• A Beginner's Python Tutorial
• A Bit of Python and Other Things
• A Guide to Python's Magic Methods - Rafe Kettler
• Biopython
• Building Skills in Object-Oriented Design (Python) (PDF) (2.1.1)
• Building Skills in Python (PDF) (2.6)
• Byte of Python (2.7.x)
• Data Structures and Algorithms in Python
• Dive into Python - Mark Pilgrim (2.3)
• Dive into Python 3 - Mark Pilgrim (3.0)
• Full Stack Python
• Google's Python Class (2.4 - 2.x)
• Google's Python Style Guide
• Hacking Secret Cyphers with Python - Al Sweigart (3.3)
• High Performance Python
• Hitchiker's Guide to Python! (2.6)
• How to Think Like a Computer Scientist: Learning with Python - Allen B. Downey, Jeff Elkner and Chris Meyers (2.4)
  • How to Think Like a Computer Scientist: Learning with Python, Interactive Edition (3.2)
• Introduction to Programming Using Python - Cody Jackson (1st edition) (2.3)
• Introduction to Programming with Python (3.3)
• Introduction to python - Kracekumar (2.7.3)
• Invent Your Own Computer Games With Python - Al Sweigart (3.1)
• Learn Python The Hard Way (2.5 - 2.6)
• Learning to Program (2.3)
• Learning to Program with Python - Richard L. Halterman (PDF) (3.2)
• Learn Python in Y minutes
• Learn to Program Using Python - Cody Jackson
• Lectures on scientific computing with python - J.R. Johansson (2.7)
• Making Games with Python & Pygame - Al Sweigart (2.7)
• Modeling Creativity: Case Studies in Python - Tom D. De Smedt (PDF)
• Natural Language Processing with Python (2.5)
• Non-Programmer's Tutorial for Python 2.6 (2.6)
• Non-Programmer's Tutorial for Python 3 (3.3)
• Porting to Python 3: An In-Depth Guide (2.6 - 2.x & 3.1 - 3.x)
• Practical Programming in Python - Jeffrey Elkner
• Program Arcade Games With Python And Pygame (3.3)
• Programming Computer Vision with Python
• Python 2.7 quick reference - New Mexico Tech (2.7)
• Python Bibliotheca
• Python Cookbook - David Beazley
• Python for Econometrics - Kevin Sheppard (2.7.5)
• Python for Fun
• Python for Informatics: Exploring Information (2.7.5)
• Python for you and me (2.7.3)
• Python for you and me (3.x)
• Python Idioms (PDF)
• Python in Hydrology - Sat Kumar Tomer
• Python Koans (2.7 or 3.x)
• Python Module of the Week
• Python Practice Book (2.7.1)
• Python Practice Projects
• Python Programming (PDF) (2.6)
• Python Scientific Lecture Notes
• Python Scripting for Computational Science - Hans Petter Langtangen
• Python Standard Library - Fredrik Lundh
• Snake Wrangling For Kids (3.x)
• Test-Driven Web Development with Python (3.3 - 3.x)
• Text Processing in Python - David Mertz (2.3 - 2.x)
• The Art and Craft of Programming (3.x)
• The Python Ecosystem: An Introduction
• The Programming Historian - William J. Turkel, Adam Crymble and Alan MacEachern
• Think Python - Allen B. Downey (2.x & 3.0)
• Web2py: Complete Reference Manual, 6th Edition (pre-release) (2.5 - 2.x)
• Welcome to Problem Solving with Algorithms and Data Structures - Brad Miller and David Ranum
• Wikibooks: Python Programming (2.7)

Django

• Django by Example (1.2)
• Django by Example for Django 1.5 (1.5)
• Djen of Django
• Effective Django (1.5)
• Getting started with Django (video)
• Tango With Django (1.5)
• Test-Driven Web Development with Python (1.7)
• The Django book (2.0)

Flask

• Explore Flask - Robert Picard
• Flask Microframework
• The Flask Mega-Tutorial - Miguel Grinberg (0.9)

Kivy

• Kivy Programming Guide

Pandas

• Learn Pandas - Hernan Rojas (0.13.0)

Pyramid

• Pyramid for humans

QML

• Qt5 Cadaques (HTML, PDF, ePub) (work in progress) - Juergen Bocklage-Ryannel and Johan Thelin

R

• Advanced R Programming
• Introduction to Probability and Statistics Using R (PDF) - G. Jay Kerns
• Learning Statistics with R - Daniel Navarro
• learnR - (Work in Progress) - Kun Ren
• Practical Regression and Anova using R (PDF) - Julian J. Faraway
• R by example
• R for spatial analysis (PDF)
• R language for Programmers - John D. Cook
• R practicals (PDF)
• R Programming
• The R Inferno (PDF) - Patrick Burns
• The R Language
• The R Manuals
• R Succinctly, Syncfusion (PDF, Kindle)(Just fill the fields with any values)

Racket

• Programming Languages: Application and Interpretation
• The Racket Guide

REBOL

• Learn REBOL - Nick Antonaccio

Ruby

• A community-driven Ruby style guide
• CodeCademy Ruby
• How To Think Like a Computer Scientist: Learning With Ruby
• Just Enough Ruby to Get By
• Learn Ruby the hard way
• Learn to Program, by Chris Pine
• Mr. Neighborly's Humble Little Ruby Book
• Practicing Ruby
• Programming Ruby
• Ruby Essentials
• Ruby Hacking Guide
• Ruby in Twenty Minutes
• Ruby Koans
• Ruby Learning
• Ruby Programming
• Ruby User's Guide
• Ruby User's Guide
• The Bastards Book of Ruby
• The Little Book Of Ruby
• The Unofficial Ruby Usage Guide (at Google) - Ian Macdonald
• Why's (Poignant) Guide to Ruby (mirror)
• I Love Ruby

RSpec

• Better Specs (RSpec Guidelines with Ruby)

Sinatra

• Sinatra Book

Ruby on Rails

• A community-driven Rails style guide
• Kestrels, Quirky Birds, and Hopeless Egocentricity
• Objects on Rails
• Rails Girls Guides
• Ruby on Rails Guides
• Ruby on Rails Tutorial: Learn Rails By Example
• Ruby on Rails 3.2 - Step by Step
• Ruby on Rails 4.0 Guide
• Upgrading to Rails 4
• Building REST APIs with Rails

Rust

• Rust by Example
• Rust for Rubyists

Sage

• Sage for Power Users (PDF) - William
• The Sage Manuals

Scala

• A Scala Tutorial for Java programmers (PDF)
• Another tour of Scala
• EAI Patterns with Actor Model - Vaughn Vernon
• Effective Scala
• Learning Scalaz
• Pro Scala: Monadic Design Patterns for the Web
• Program Transformation in Scala - Anastasia Izmaylova
• Programming in Scala, First Edition
• S-99: Ninety-Nine Scala Problems - Phil! Gold
• Scala By Example (PDF)
• Scala Cookbook: Bonus Chapters - Alvin Alexander
• Scala & Design Patterns: Exploring Language Expressivity - Fredrik Skeel Løkke
• Scala for Perl 5 Programmers - Breno G. de Oliveira
• Scala for the Impatient (A1 Scala Level chapters) - Cay S. Horstmann
• Scala School by Twitter
• Scala Tutorial
• tetrix in Scala
• The Neophyte's Guide to Scala - Daniel Westheide
• Xtrace

Lift

• Exploring Lift (published earlier as "The Definitive Guide to Lift",PDF)
• Lift
• Lift Cookbook - Richard Dallaway
• Simply Lift - David Pollak

Play Scala

• Play Framework Recipes - Alvin Alexander
• Work with Play: Build web applications using Scala and the Play Framework - Diego Castorina

Scheme

• An Introduction to Scheme and its Implementation
• Concrete Abstractions: An Introduction to Computer Science Using Scheme
• How to Design Programs
• Simply Scheme: Introducing Computer Science
• Structure and Interpretion of Computer Programs
• Teach Yourself Scheme in Fixnum Days
• The Scheme Programming Language Edition 3, Edition 4
• Write Yourself a Scheme in 48 Hours

Scilab

• Introduction to Scilab
• Programming in Scilab
• Writing Scilab Extensions

Scratch

• Computer Science Concepts in Scratch

Sed

• Sed - An Introduction and Tutorial

Silverlight

• 10 Laps around Silverlight 5

Smalltalk

• Computer Programming using GNU Smalltalk (PDF)
• Dynamic Web Development with Seaside
• Free Online Smalltalk Books (meta-list)
• Pharo by Example (Smalltalk DE)
• Squeak By Example (Smalltalk IDE)

SQL (implementation agnostic)

• A Primer on SQL, Second Edition
• Developing Time-Oriented Database Applications in SQL
• Learn SQL The Hard Way
• SQL For Web Nerds
• Use The Index, Luke!: A Guide To SQL Database Performance

SQL Server

• Best of SQLServerCentral.com Vol 7(RedGate, By SQLServerCentral Authors)
• Brad's Sure Guide to SQL Server Maintenance Plans(RedGate, By Brad McGehee)
• Defensive Database Programming (PDF)(RedGate, By Alex Kuznetsov)
• How to Become an Exceptional DBA(RedGate, By Brad McGehee)
• Inside the SQL Server Query Optimizer(RedGate, By Benjamin Nevarez)
• Introducing Microsoft SQL Server 2014
• Introducing Microsoft SQL Server 2008 R2
• Introducing Microsoft SQL Server 2012
• Mastering SQL Server Profiler(RedGate, By Brad McGehee)
• Performance Tuning with SQL Server Dynamic Management Views(RedGate, By Tim Ford and Louis Davidson)
• Protecting SQL Server Data(RedGate, By John Magnabosco)
• SQL Server 2012 Tutorials: Reporting Services
• SQL Server Execution Plans (PDF)(RedGate, By Grant Fritchey)
• SQL Server Execution Plans, Second Edition (PDF)(RedGate, By Grant Fritchey)
• SQL Server Tacklebox(RedGate, By Rodney Landrum)
• SQL Server Transaction Log Management(RedGate, By Tony Davis and Gail Shaw)
• SQL Server Concurrency: Locking, Blocking and Row Versioning(RedGate, By Kalen Delaney)
• SQL Server Backup and Restore(RedGate, By Shawn McGehee)
• SQL Server Hardware(RedGate, By Glenn Berry)
• SQL Server Statistics(RedGate, By Holger Schmeling)
• SQL Server Stumpers Vol.5(RedGate, By SQLServerCentral Authors)
• The Art of SQL Server FILESTREAM(RedGate, By Jacob Sebastian and Sven Aelterman)
• Troubleshooting SQL Server: A Guide for the Accidental DBA(RedGate, By Jonathan Kehayias and Ted Krueger)

Standard ML

• Programming in Standard ML, Draft - Robert Harper

Subversion

• Subversion Version Control (PDF)
• Version Control with Subversion

Swift

• The Swift Programming Language (iBook)

Tcl

• Tcl Programming, by Richard.Suchenwirth, et. al.
• TclWise, by Salvatore Sanfilippo

Teradata

• Teradata Books

TeX

• Notes On Programming in TeX (PDF) by Christian Feursänger
• TeX by Topic, A TeXnician's Reference, by Victor Eijkhout
• TeX for the Impatient, by Paul Abrahams, Kathryn Hargreaves, and Karl Berry
• The Computer Science of TeX and LaTeX, by Victor Eijkhout

See also LaTeX

Tizen

• Tizen for Dummies (PDF) by Jon Lansdell, Cheng Luo, Michelle Somersville

TLA

• Specifying Systems: The TLA+ Language and Tools for Hardware and Software Engineers (Postscript or PDF) by Leslie Lamport

TypeScript

• TypeScript for C# Programmers
• TypeScript Succinctly, Syncfusion (PDF, Kindle)(Just fill the fields with any values)

Unix

• Commentary on the Sixth Edition UNIX Operating System - J. Lions
• Unix Toolbox - Colin Barschel
• UNIX Tutorial for Beginners
• Unix for Poets - Kenneth Ward Church (PDF)

Verilog

• Verilog Tutorial

VHDL

• VHDL Tutorial
• VHDL Tutorial - Peter J. Ashenden
• VHDL Tutorial: Learn By Example
• Free Range VHDL (TeX and PDF) by Bryan Mealy, Fabrizio Tappero

Vim

• A Byte of Vim
• A guide to getting started with VIM
• Learn Vim Progressively
• Learn Vimscript the Hard Way
• Use Vim Like A Pro(Leanpub, by Tim Ottinger)
• Vi Improved -- Vim (PDF) by Steve Oualline
• Vim Recipes (PDF)
• Vim Regular Expressions 101

Visual Basic

• Visual Basic Essentials

Visual Prolog

• A Beginners' Guide to Visual Prolog
• Visual Prolog for Tyros

Web Services

• RESTful Web Services (PDF)

Windows 8

• Programming Windows 8 Apps with HTML, CSS, and JavaScript (v1)
• * Programming Windows 8 Apps with HTML, CSS, and JavaScript (v2, incomplete)

Windows Phone

• Developing An Advanced Windows Phone 7.5 App That Connects To The Cloud
• Programming Windows Phone 7
• Windows Phone Programming Blue Book
• Windows Phone 8 Development Succinctly (PDF) by Matteo Pagani

Workflow

• Declare Peace on Virtual Machines. A guide to simplifying vm-based development on a Mac

xBase (dBase / Clipper / Harbour)

• Application Development with Harbour
• CA-Clipper 5.2 Norton Guide
• Clipper Tutorial: a Guide to Open Source Clipper(s)