This list, organized by subject, is for books that cover a programming-related subject in a programming-language agnostic way.
Books that cover a specific programming language can be found in the BY PROGRAMMING LANGUAGE file list.

• 0 - Meta-Lists
• Algorithms & Data Structures
• Artificial Intelligence
• Cellular Automata
• Cloud Computing
• Competitive Programming
• Compiler Design
• Computer Science
• Computer Vision
• Containers
• Database
• Datamining
• Game Development
• Graphical user interfaces
• Graphics Programming
• Information Retrieval
• Licensing
• Machine Learning
• Mathematics
• Mathematics For Computer Science
• Misc
• Networking
• Open Source Ecosystem
• Operating Systems
• Parallel Programming
• Partial Evaluation
• Professional Development
• Programming Paradigms
• Regular Expressions
• Reverse Engineering
• Search Engines
• Security
• Software Architecture
• Standards
• Theoretical Computer Science
• Web Performance
• Web Services
• Workflow

• 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 Cookie required. (email address requested, not required)
• Code Catalog: A Collection of Code Examples from Prominent Open Source Projects (HTML)
• conceptf1.blogspot.com
• Free Smalltalk Books, collected by Stéphane Ducasse
• Free Tech Books
• Goalkicker - Programming Notes for Professionals books
• IBM Redbooks
• InfoQ Minibooks
• InTech: Computer and Information Science
• JSBooks - directory of free javascript ebooks
• Learn X in Y minutes
• Learneroo Resources to Learn Programming
• Microsoft Guides to Software
• 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
• O'Reilly's Open Books Project
• Papers we love
• Programming - Wikibooks
• Red Gate Books
• Stef's Free Online Smalltalk Books
• TechBeamers.com
• TechBooksForFree.com
• The Definitive C++ Book Guide and List
• Theassayer.org
• tutorialspoint

• A Field Guide To Genetic Programming - Riccardo Poli et al. (PDF)
• Algorithm Design - Jon Kleinberg and Éva Tardos (PDF)
• Algorithmic Graph Theory
• Algorithms - Wikibooks
• Algorithms, 4th Edition - Robert Sedgewick and Kevin Wayne
• Algorithms and Automatic Computing Machines (1963) - B. A. Trakhtenbrot
• Algorithms and Complexity - Herbert S. Wilf (PDF)
• Algorithms Course Materials - Jeff Erickson
• Algorithms Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• Analysis and Design of Algorithms - Sandeep Sen, IIT Delhi
• Animated Algorithm and Data Structure Visualization (Resource)
• Annotated Algorithms in Python: Applications in Physics, Biology, and Finance - Massimo di Pierro
• Binary Trees (PDF)
• Data Structures - Prof. Subhashis Banerjee, IIT Delhi
• Data Structures (Into Java) - Paul N. Hilfinger (PDF)
• Data Structures and Algorithms: Annotated Reference with Examples - G. Barnett and L. Del Tongo
• Data Structures Succinctly Part 1, Syncfusion (PDF, Kindle) (email address requested, not required)
• Data Structures Succinctly Part 2, Syncfusion (PDF, Kindle) (email address requested, not required)
• Elementary Algorithms - Larry LIU Xinyu
• Foundations of Computer Science - Al Aho and Jeff Ullman
• Geometry Algorithms - Dan Sunday
• Lectures Notes on Algorithm Analysis and Computational Complexity (Fourth Edition) - Ian Parberry (use form at bottom of license)
• LEDA: A Platform for Combinatorial and Geometric Computing - K. Mehlhorn et al.
• Linked List Basics (PDF)
• Linked List Problems (PDF)
• Matters Computational: Ideas, Algorithms, Source Code (PDF)
• Open Data Structures: An Introduction - Pat Morin
• Planning Algorithms
• Problems on Algorithms (Second Edition) - Ian Parberry (use form at bottom of license)
• Purely Functional Data Structures (1996) - Chris Okasaki (PDF)
• Sequential and parallel sorting algorithms
• Text Algorithms (PDF)
• The Algorithm Design Manual
• The Art of Computer Programming - Donald Knuth (fascicles, mostly volume 4)
• The Design of Approximation Algorithms (PDF)
• The Great Tree List Recursion Problem (PDF)
• The Kademlia Protocol Succinctly - Marc Clifton
• Think Complexity - Allen B. Downey (2nd Edition) (PDF, HTML)

• Introduction to Autonomous Robots - Nikolaus Correll (PDF)
• The Quest for Artificial Intelligence: A History of Ideas and Achievements - Nils J. Nilsson (PDF)

• A New Kind of Science - Stephen Wolfram

• AWS Well-Architected Framework (PDF, HTML)
• Azure for Architects, Third Edition (PDF) (email address or account required)
• Azure Functions Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• Cloud Computing for Science and Engineering - Ian Foster, Dennis B. Gannon (:construction: in process)
• Cloud Design Patterns
• Designing Distributed Systems (account required)
• Learn Azure in a Month of Lunches - Iain Foulds (PDF)
• Monitoring Modern Infrastructure (account required)
• Multi-tenant Applications for the Cloud, 3rd Edition
• OpenStack Operations Guide
• Streamline microservice management with Istio Service Mesh (account required)
• The Developer’s Guide to Azure

• Competitive Programmer's Handbook - Antti Laaksonen (PDF)
• Competitive Programming, 1st Edition - Steven Halim (PDF)
• Competitive Programming, 2nd Edition - Steven Halim (PDF)
• Principles of Algorithmic Problem Solving - Johan Sannemo (PDF)

• An Introduction to GCC - Brian Gough
• Basics of Compiler Design (Anniversary Edition) - Torben Mogensen
• Compiler Design in C (1990) - Allen Holub, Prentice Hall
• Compiler Design: Theory, Tools, and Examples, C/C++ Edition - Seth D. Bergmann (PDF)
• Compiler Design: Theory, Tools, and Examples, Java Edition - Seth D. Bergmann (PDF)
• Compiling Scala for the Java Virtual Machine - Michel Schinz (PDF)
• Compiling Techniques (1969) - F.R.A. Hopgood, Macdonald
• Crafting Interpreters (:construction:) - Bob Nystrom (HTML)
• Implementing Functional Languages: A Tutorial - Simon Peyton Jones, David Lester
• Let's Build a Compiler (PDF)
• Practical and Theoretical Aspects of Compiler Construction (class lectures and slides)
• The ANTLR Mega Tutorial

• Computational Thinking - Jeannette Wing, Carnegie-Mellon University (PDF)
• Computer Science I - Draft - Dr. Chris Bourke (PDF) (:construction: in process)
• Computer Science II - Draft - Dr. Chris Bourke (PDF) (:construction: in process)
• CS Principles: Big Ideas in Programming - Mark Guzdial and Barbara Ericson (HTML)

• Computer Vision - Dana Ballard, Chris Brown
• Computer Vision: Algorithms and Applications - Richard Szeliski
• Computer Vision: Models, Learning, and Inference - Simon J.D. Prince
• Programming Computer Vision with Python - Jan Erik Solem

• Docker Jumpstart - Andrew Odewahn

• Database Design, 2nd Ed. - Adrienne Watt, Nelson Eng (HTML, PDF, EPUB, Kindle)
• Database Explorations (PDF)
• Database Fundamentals (PDF)
• Databases, Types, and The Relational Model: The Third Manifesto (PDF)
• Foundations of Databases
• Readings in Database Systems, 5th Ed.
• Temporal Database Management - Christian S. Jensen
• The Theory of Relational Databases

• A Programmer's Guide to Data Mining - Ron Zacharski (Draft)
• Data Jujitsu: The Art of Turning Data into Product (email address requested, not required)
• Data Mining Algorithms In R - Wikibooks
• Internet Advertising: An Interplay among Advertisers, Online Publishers, Ad Exchanges and Web Users (PDF)
• Introduction to Data Science - Jeffrey Stanton
• Introduction to Data Science - Rafael A Irizarry (Leanpub account or valid email requested)
• Mining of Massive Datasets
• School of Data Handbook
• Statistical inference for data science - Brian Caffo
• The Ultimate Guide to 12 Dimensionality Reduction Techniques (with Python codes) - Pulkit Sharma
• Theory and Applications for Advanced Text Mining

• 2D Game Development: From Zero To Hero - Daniele Penazzo (HTML, PDF, EBPUB, Kindle...) (:construction: in process)
• Coding With Minecraft - Al Sweigart
• Designing Virtual Worlds - Richard A. Bartle (PDF)
• Game AI Pro - Steve Rabin
• Game Design with AGS - Dave Ensminger, A. G. Madi
• Game Programming Patterns - Bob Nystrom
• Procedural Content Generation in Games - Noor Shaker, Julian Togelius, Mark Nelson

• 3D Game Shaders For Beginners - David Lettier (Git) (HTML)
• Blender 3D: Noob to Pro - Wikibooks
• Blender Manual
• Computer Graphics from scratch - Gabriel Gambetta (:construction: in process)
• DirectX manual (draft)
• GPU Gems
• Graphics Programming Black Book - Michael Abrash
• Introduction to Modern OpenGL - Alexander Overvoorde (HTML, EPUB, PDF) (C++)
• Introduction to TouchDesigner 099 (Leanpub account or valid email requested)
• Learn Computer Graphics From Scratch! - Scratchapixel (:construction: in process)
• Learn OpenGL - Joey de Vries
• Learn OpenGL RS - Benjamin Wasty et al. (:construction: in process) (Rust)
• Learning Modern 3D Graphics Programming - Jason L. McKesson (draft)
• Notes for a Computer Graphics Programming Course - Dr. Steve Cunningham (PDF)
• OpenGL - Concepts and illustrations.
• Ray Tracing in One Weekend - Peter Shirley (HTML)
• ShaderX series - Wolfgang Engel
• Tutorials for modern OpenGL
• WebGL Insights - Patrick Cozzi and Contributors

• Programming with gtkmm 4
• Search User Interfaces - Marti A. Hearst
• The GLib/GTK+ Development Platform - Sébastien Wilmet (PDF)

• Information Retrieval: A Survey (PDF)
• Introduction to Information Retrieval

• Creative Commons: a user guide - Simone Aliprandi
• Open Source Licensing Software Freedom and Intellectual Property Law - Lawrence Rosen
• The Public Domain: Enclosing the Commons of the Mind - James Boyle

• A Brief Introduction to Machine Learning for Engineers - Osvaldo Simeone (PDF)
• A Brief Introduction to Neural Networks
• A Comprehensive Guide to Machine Learning - Soroush Nasiriany, Garrett Thomas, William Wang, Alex Yang (PDF)
• A Course in Machine Learning (PDF)
• A First Encounter with Machine Learning (PDF)
• A Selective Overview of Deep Learning - Fan, Ma, and Zhong (PDF)
• Algorithms for Reinforcement Learning - Csaba Szepesvári (PDF)
• An Introduction to Statistical Learning - Gareth James, Daniela Witten, Trevor Hastie and Robert Tibshirani
• Bayesian Reasoning and Machine Learning
• Deep Learning - Ian Goodfellow, Yoshua Bengio and Aaron Courville
• Deep Learning for Coders with Fastai and PyTorch - Jeremy Howard, Sylvain Gugger (Jupyter Notebooks)
• Deep Learning with PyTorch - Eli Stevens, Luca Antiga, Thomas Viehmann (PDF)
• Dive into Deep Learning
• Explorations in Parallel Distributed Processing: A Handbook of Models, Programs, and Exercises - James L. McClelland
• Foundations of Machine Learning, Second Edition - Mehryar Mohri, Afshin Rostamizadeh, Ameet Talwalkar
• Free and Open Machine Learning - Maikel Mardjan
• Gaussian Processes for Machine Learning
• IBM Machine Learning for Dummies - Judith Hurwitz, Daniel Kirsch
• Information Theory, Inference, and Learning Algorithms
• Interpretable Machine Learning - Christoph Molnar
• Introduction to CNTK Succinctly - James McCaffrey
• Introduction to Machine Learning - Amnon Shashua
• Keras Succinctly - James McCaffrey
• Learn Tensorflow - Jupyter Notebooks
• Learning Deep Architectures for AI (PDF)
• Machine Learning
• Machine Learning for Data Streams - Albert Bifet, Ricard Gavaldà, Geoff Holmes, Bernhard Pfahringer
• Machine Learning from Scratch - Danny Friedman
• Machine Learning, Neural and Statistical Classification
• Mathematics for Machine Learning - Garrett Thomas (PDF)
• Mathematics for Machine Learning - Marc Peter Deisenroth, A Aldo Faisal, and Cheng Soon Ong
• Neural Networks and Deep Learning
• Probabilistic Models in the Study of Language (Draft, with R code)
• Python Machine Learning Projects - Lisa Tagliaferri and Brian Boucheron (PDF, EPUB, MOBI)
• Reinforcement Learning: An Introduction - Richard S. Sutton, Andrew G. Barto (PDF)
• Speech and Language Processing (3rd Edition Draft) - Daniel Jurafsky, James H. Martin (PDF)
• The Elements of Statistical Learning - Trevor Hastie, Robert Tibshirani, and Jerome Friedman
• The LION Way: Machine Learning plus Intelligent Optimization - Roberto Battiti, Mauro Brunato (PDF)
• The Python Game Book
• Top 10 Machine Learning Algorithms Every Engineer Should Know - Binny Mathews and Omair Aasim
• Understanding Machine Learning: From Theory to Algorithms - Shai Shalev-Shwartz, Shai Ben-David

• A Computational Introduction to Number Theory and Algebra - Victor Shoup
• A First Course in Complex Analysis - Matthias Beck, Gerald Marchesi, Dennis Pixton, Lucas Sabalka
• A First Course in Linear Algebra - Rob Beezer
• A Friendly Introduction to Mathematical Logic - Christopher C. Leary and Lars Kristiansen
• A Gentle Introduction to the Art of Mathematics - Joseph E. Fields
• A Programmer's Introduction to Mathematics - Jeremy Kun
• Abstract Algebra: Theory and Applications - Tom Judson
• Active Calculus - Matt Boelkins
• Advanced Algebra - Anthony W. Knapp (PDF)
• Algebra: Abstract and Concrete - Frederick Goodman
• Algebra: An Elementary Text-Book, Part I (1904) - G. Chrystal (PDF)
• Algebra: An Elementary Text-Book, Part II (1900) - G. Chrystal (PDF)
• Algebraic Topology - Allen Hatcher (PDF)
• An Introduction to the Theory of Numbers - Leo Moser (PDF)
• Analytic Geometry (1922) - Lewis Parker Siceloff, George Wentworth, David Eugene Smith (PDF)
• APEX Calculus - Gregory Hartman, Brian Heinold, Troy Siemers, and Dimplekumar Chalishajar
• Applied Combinatorics - Mitchel T. Keller and William T. Trotter
• Applied Discrete Structures - Alan Doerr and Kenneth Levasseur
• Basic Algebra - Anthony W. Knapp (PDF)
• Basic Analysis: Introduction to Real Analysis - Jiří Lebl
• Basics of Algebra, Topology, and Differential Calculus (PDF)
• Bayesian Methods for Hackers - Cameron Davidson-Pilon
• Beginning and Intermediate Algebra - Tyler Wallace
• Book of Proof - Richard Hammack (PDF)
• Calculus - Gilbert Strang
• Calculus I - Jerrold E. Marsden and Alan Weinstein
• Calculus in Context - James Callahan
• Calculus Made Easy - Silvanus P. Thompson (PDF)
• Category Theory for the Sciences - David I. Spivak
• CK-12 Probability and Statistics - Advanced
• CLP-1 Differential Calculus - Joel Feldman, Andrew Rechnitzer, and Elyse Yeager
• CLP-2 Integral Calculus - Joel Feldman, Andrew Rechnitzer, and Elyse Yeager
• CLP-3 Multivariable Calculus - Joel Feldman, Andrew Rechnitzer, and Elyse Yeager
• CLP-4 Vector Calculus - Joel Feldman, Andrew Rechnitzer, and Elyse Yeager
• Collaborative Statistics
• Combinatorics Through Guided Discovery - Kenneth Bogart
• Complex Analysis - George Cain
• Computational and Inferential Thinking. The Foundations of Data Science
• Computational Geometry
• Computational Mathematics with SageMath - Paul Zimmermann et al.
• Concepts & Applications of Inferential Statistics
• Convex Optimization - Stephen Boyd and Lieven Vandenberghe
• Coordinate Geometry (1911) - Henry Buchard Fine and Henry Dallas Thompson (PDF)
• Differential Equations - Paul Dawkins (PDF, use download menu to download)
• Differential Equations (1922) - H. B. Phillips (PDF)
• Discrete Mathematics: An Open Introduction - Oscar Levin
• Discrete Mathematics: First and Second Course - Edward A. Bender and S. Gill Williamson
• Elementary Differential Equations - William F. Trench (PDF)
• Elementary Differential Equations (with Boundary Value Problems) - William F. Trench
• Elementary Number Theory: Primes, Congruences, and Secrets - William Stein
• Elementary Real Analysis - Brian S. Thomson, Judith B. Bruckner, Andrew M. Bruckner
• Elements of Abstract and Linear Algebra - E. H. Connell
• Elements of Differential and Integral Calculus (1911) - William Anthony Granville (PDF)
• Essentials of Metaheuristics - Sean Luke
• First Course in Algebra (1910) - Herbert E. Hawkes, William A. Luby, Frank C. Touton (PDF)
• Foundations of Combinatorics with Applications - Edward A. Bender and S. Gill Williamson
• Foundations of Constructive Probability Theory - Yuen-Kwok Chan (PDF)
• Geometry with an Introduction to Cosmic Topology - Michael P. Hitchman
• Graph Theory
• How We Got from There to Here: A Story of Real Analysis - Robert Rogers and Eugene Boman
• Introduction to Probability - Charles M. Grinstead and J. Laurie Snell
• Introduction to Probability and Statistics Spring 2014
• Introduction to Proofs - Jim Hefferon
• Introduction to Real Analysis - William F. Trench
• Introduction to Statistical Thought - Michael Lavine
• Introductory Statistics for the Life and Biomedical Sciences - Julie Vu and David Harrington
• Kalman and Bayesian Filters in Python
• Knapsack Problems - Algorithms and Computer Implementations - Silvano Martello and Paolo Toth
• Lecture Notes of Linear Algebra - Dr. P. Shunmugaraj, IIT Kanpur (PDF)
• Lies, Damned Lies, or Statistics: How to Tell the Truth with Statistics - Jonathan A. Poritz (PDF)
• Linear Algebra - Dr. Arbind K Lal, Sukant Pati (PDF) (:construction: in process)
• Linear Algebra (PDF)
• Linear Algebra - Jim Hefferon
• Linear Algebra Done Wrong - Sergei Treil
• Linear Algebra, Infinite Dimensions, and Maple - James Herod
• Linear Methods of Applied Mathematics - Evans M. Harrell II and James V. Herod
• Magic Squares and Cubes (1917) - W. S. Anderson (PDF)
• Math in Society - David Lippman
• Mathematical Analysis I - Elias Zakon
• Mathematical Discovery - Andrew M. Bruckner, Brian S. Thomson, and Judith B. Bruckner
• Mathematical Logic - an Introduction (PDF)
• Mathematical Reasoning: Writing and Proof - Ted Sundstrom
• Mathematics, MTH101A - P. Shunmugaraj, IIT Kanpur
• Modern Statistics for Modern Biology - Susan Holmes and Wolfgang Huber
• Multivariable Calculus - George Cain and James Herod
• Non-Uniform Random Variate Generation - Luc Devroye (PDF)
• Notes on Diffy Qs - Jiří Lebl
• Number Theory - Holden Lee MIT
• Number Theory: In Context and Interactive - Karl-Dieter Crisman
• Odds and Ends: Introducing Probability & Decision with a Visual Emphasis - Jonathan Weisberg
• Online Statistics Education - David Lane
• OpenIntro Statistics - David M. Diez, Christopher D. Barr, Mine Çetinkaya-Rundel
• ORCCA: Open Resources for Community College Algebra - Portland Community College
• Ordinary Differential Equations - Wikibooks
• Plane Geometry (1913) - George Wentworth and David Eugene Smith (PDF)
• Planes and Spherical Trigonometry (1915) - George Wentworth and David Eugene Smith (PDF)
• Precalculus - Carl Stitz and Jeff Zeager (PDF)
• Probability and Statistics Cookbook
• Probability and Statistics EBook
• Probability: Lectures and Labs - Mark Huber
• Recreations in Math - H. E. Licks (PDF)
• Sage for Undergraduates - Gregory Bard
• Second Course in Algebra - Herbert E. Hawkes, William A. Luby, Frank C. Touton (PDF)
• Seven Sketches in Compositionality: An Invitation to Applied Category Theory - Brendan Fong and David I. Spivak (PDF)
• Statistical Thinking for the 21st Century - Russell A. Poldrack
• Statistics Done Wrong - Alex Reinhart
• SticiGui - Philip Stark
• Tea Time Numerical Analysis - Leon Q. Brin
• The Joy of Cryptography (2020) - Mike Rosulek (PDF) (:construction: in process)
• Think Bayes: Bayesian Statistics Made Simple - Allen B. Downey
• Think Stats: Probability and Statistics for Programmers - Allen B. Downey (using Python)
• Vector Calculus - Michael Corral
• Yet Another Introductory Number Theory Textbook - Jonathan A. Poritz (PDF)

• A Mathematical Theory of Communication - Claude E.Shannon
• Discrete Structures for Computer Science: Counting, Recursion, and Probability - Michiel Smid

• 10 Keys to Great Landing Pages - iThemes Media (PDF)
• 2016 European Software Development Salary Survey
• 2016 Software Development Salary Survey
• 97 Things Every Programmer Should Know - Extended (Leanpub account or valid email requested)
• A MACHINE MADE THIS BOOK ten sketches of computer science - JOHN WHITINGTON (PDF)
• Ansible Up & Running (first three chapters) (account required)
• Asterisk™: The Definitive Guide
• Barcode Overview (PDF)
• Bitcoin and Cryptocurrency Technologies - Arvind Narayanan, Joseph Bonneau, Edward Felten, Andrew Miller, Steven Goldfeder (PDF)
• Come, Let's Play: Scenario-Based Programming Using Live Sequence Charts
• Communicating Sequential Processes - Tony Hoare (PDF)
• Confessions of an Unintentional CTO: Lessons in Growing a Web App - Jack Kinsella
• Culture & Empire: Digital Revolution (PDF)
• Design With FontForge
• Designing Interfaces - Jennifer Tidwell
• DevDocs - Documents for Developers in 1 place
• DevOps For Dummies (IBM Edition) (PDF)
• Digital Signal Processing For Communications
• Digital Signal Processing For Engineers and Scientists
• Digital Signal Processing in Python - Allen B. Downey
• "DYNAMIC LINKED LIBRARIES": Paradigms of the GPL license in contemporary software - Luis A. Enríquez
• Essential Image Optimization - Addy Osmani
• Foundations of Programming (PDF)
• Getting Real - Basecamp, 37signals (HTML, PDF)
• Google Maps API Succinctly - Mark Lewin
• Hacknot: Essays on Software Development - Ed Johnson
• Hello SDL - Lazy Foo' Productions
• High-Performance Scientific Computing (class lectures and slides)
• Holm School (You Might Learn Something) - How to Teach Yourself To Be A Computer Scientist for Hamiltons a Month - Ryhen Holm
• HoloLens Succinctly - Lars Klint
• How Computers Work - R. Young
• How to Become a Programmer (PDF)
• How to Think Like a Computer Scientist - Peter Wentworth, Jeffrey Elkner, Allen B. Downey, and Chris Meyers
• Image Processing in C: Analyzing and Enhancing Digital Images - Dwayne Phillips
• Information Technology and the Networked Economy (PDF)
• Introduction to Scientific Programming in C++ and Fortran - Victor Eijkhout (PDF)
• IRPF90 Fortran code generator - Anthony Scemama
• Learn Programming - Antti Salonen
• 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 - Bret Victor
• Mastering Bitcoin - Unlocking digital currencies - Andreas M. Antonopoulos
• Mobile Developer's Guide to the Galaxy (Leanpub account or valid email requested)
• Modeling Reactive Systems with Statecharts
• MSIX Succinctly - Matteo Pagani
• Networks, Crowds, and Markets: Reasoning About a Highly Connected World
• Object-Oriented Reengineering Patterns - Serge Demeyer, Stéphane Ducasse and Oscar Nierstrasz
• Open Government; Collaboration, Transparency, and Participation in Practice - Daniel Lathrop, Laurel Ruma
• PDQ: Pretty Darn Quick: An Agile, All-Purpose Methodology - Jeff Franz-Lien (Leanpub account or valid email requested)
• Philosophy of Computer Science (PDF)
• Playtime with Hyperledger Composer - Shubham Chadokar (PDF)
• PNG: The Definitive Guide
• Pointers And Memory (PDF)
• Principles of Computer System Design (PDF)
• Programming with Unicode
• Real-World Maintainable Software - Abraham Marin-Perez
• Record-Playback Test Automation: Sahi & Selenium IDE: Critical Evaluation of Record-Playback Automation Tools - Shashikant Jagtap (Leanpub account or valid email requested)
• Scientific Programming and Computer Architecture - Divakar Viswanath
• Signal Computing: Digital Signals in the Software Domain - Michael Stiber, Bilin Zhang Stiber, Eric C. Larson (PDF)
• Small Memory Software
• Web Almanac (PDF)
• Writing Native Mobile Apps in a Functional Language Succinctly - Vassili Kaplan

• An Introduction to Computer Networks (HTML, PDF, Kindle)
• Bits, Signals, and Packets: An Introduction to Digital Communications and Networks
• Code Connected vol.1 (PDF) (book on ZeroMQ)
• Computer Networking : Principles, Protocols and Practice (HTML, ePub, PDF, Kindle)
• Computer Networks: A Systems Approach - Larry Peterson and Bruce Davie (HTML, epub, mobi, PDF)
• Distributed systems for fun and profit
• High-Performance Browser Networking - Ilya Grigorik
• How HTTPS Works - DNSimple
• HTTP Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• HTTP2 Explained - Daniel Stenberg
• Introduction to HTTP - Launch School
• IPv6 for IPv4 Experts - Yar Tikhiy (PDF)
• Kafka, The definitive Guide - Neha Narkhede (PDF)
• Network Science - Albert-Laszló Barabási
• The TCP/IP Guide
• Understanding IP Addressing: Everything you ever wanted to know (PDF)
• ZeroMQ Guide

• Data Journalism Handbook
• Free as in Freedom: Richard Stallman and the free software revolution - Sam Williams (PDF)
• Free for All - Peter Wayner
• Free Software, Free Society: Selected Essays of Richard M. Stallman
• Getting Started with InnerSource (email address requested, not required)
• Getting started with Open source development (PDF)
• GitLab Handbook
• How to get started with open source (ePub & ODT)
• Innovation Happens Elsewhere - Ron Goldman, Richard P. Gabriel
• Introduction to Networking - Charles Severance (PDF)
• Open Advice: FOSS: What We Wish We Had Known When We Started
• Open source in Brazil - Andy Oram
• Producing Open Source Software - Karl Fogel
• 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 Art of Community - Jono Bacon (PDF)
• The Cathedral and the Bazaar - Eric S. Raymond
• The Future of the Internet - Jonathan Zittrain
• The Open Source Way
• The Wealth of Networks: How Social Production Transforms Markets and Freedom - Yochai Benkler

• A short introduction to operating systems (2001) - Mark Burgess (PDF)
• Computer Science from the Bottom Up
• How to Make a Computer Operating System (:construction: in process)
• How to write a simple operating system in assembly language - Mike Saunders (HTML)
• Operating Systems and Middleware (PDF and LaTeX)
• Operating Systems: Three Easy Pieces (PDF)
• Practical File System Design: The Be File System - Dominic Giampaolo (PDF)
• Project Oberon: The Design of an Operating System, a Compiler, and a Computer - Niklaus Wirth & Jürg Gutknecht (PDF)
• The Art of Unix Programming - Eric S. Raymond
• The Design and Implementation of the Anykernel and Rump Kernels - Antti Kantee
• The little book about OS development - Erik Helin, Adam Renberg
• The Little Book of Semaphores - Allen B. Downey
• Think OS: A Brief Introduction to Operating Systems - Allen B. Downey (PDF)
• UNIX Application and System Programming, lecture notes - Prof. Stewart Weiss (PDF)
• Writing a Simple Operating System from Scratch - Nick Blundell (PDF)
• Xv6, a simple Unix-like teaching operating system

• High Performance Computing - Charles Severance & Kevin Dowd (PDF, ePUB)
• High Performance Computing Training (LLNL materials)
• High-Performance Scientific Computing (class lectures and slides)
• 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 Kerridge (PDF) (email address requested, not required)
• The OpenCL Programming Book
• Using Concurrency and Parallelism Effectively – I - Jon Kerridge (PDF) (email address requested, not required)
• Using Concurrency and Parallelism Effectively – II - Jon

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

• Clean Code Developer: An initiative for more professionalism in software development (:construction: in process)
• Confessions of an IT Manager - Phil Factor (PDF)
• Don't Just Roll the Dice - Neil Davidson (PDF)
• How to Do What You Love & Earn What You’re Worth as a Programmer - Reginald Braithwaite
• Professional Software Development For Students - Mike G. Miller
• What I've Learned From Failure - Reginald Braithwaite

• Flow based Programming - J Paul Morrison
• Introduction to Functional Programming - J. Harrison
• Making Sense of Stream Processing - Martin Kleppmann (PDF)
• Mostly Adequate Guide to Functional Programming - Mostly Adequate Core Team
• The Pure Function Pipeline Data Flow v3.0 ---- the Grand Unified Programming Theory - Lin Pengcheng
• Type Theory and Functional Programming

• JavaScript RegExp - Sundeep Agarwal
• Python re(gex)? - Sundeep Agarwal
• Regular Expressions for Regular Folk - Shreyas Minocha
• RexEgg
• Ruby Regexp - Sundeep Agarwal
• The 30 Minute Regex Tutorial - Jim Hollenhorst
• The Bastards Book of Regular Expressions: Finding Patterns in Everyday Text - Dan Nguyen (Leanpub account or valid email requested)

• BIOS Disassembly Ninjutsu Uncovered 1st Edition - Darmawan Salihun (PDF)
• Hacking the Xbox: An Introduction to Reverse Engineering - Andrew "bunnie" Huang
• iOS App Reverse Engineering (PDF)
• Reverse Engineering for Beginners - Dennis Yurichev (PDF)

• Elasticsearch: The Definitive Guide (fork it on GH)
• Solr for newbies workshop (2019) - Hector Correa (PDF)

• A Graduate Course in Applied Cryptography
• Crypto 101 - Crypto for everyone
• CryptoParty Handbook
• Handbook of Applied Cryptography
• How HTTPS works - dnsimple
• How to deal with Passwords
• Intrusion Detection Systems with Snort (PDF)
• OpenSSL Cookbook
• OWASP Mobile Security Testing Guide - Bernhard Mueller et al.
• OWASP Testing Guide 4.0 (PDF)
• OWASP Top 10 for .NET Developers
• Security Engineering

• Agile Planning: From Ideas to Story Cards - Launch School
• Architectural Styles and the Design of Network-based Software Architectures - Roy Thomas Fielding
• Best Kept Secrets of Peer Code Review
• Building Secure & Reliable Systems - Heather Adkins, Betsy Beyer, Paul Blankinship, Piotr Lewandowski, Ana Oprea & Adam Stubblefield (PDF)
• Data-Oriented Design
• Developing Reactive Microservices (email address requested, not required)
• Domain Driven Design Quickly
• Domain-Driven Design: The First 15 Years. Essays from the DDD community - Domain-Driven Design Europe (HTML, PDF, ePub) (Leanpub account or valid email requested)
• DSL Engineering: Designing, Implementing and Using Domain-Specific Languages - Markus Voelter
• Exploring CQRS and Event Sourcing - Dominic Betts, Julián Domínguez, Grigori Melnik, Mani Subramanian, Fernando Simonazzi (EPUB, PDF - code samples)
• Guide to the Software Engineering Body of Knowledge (email adddress requested)
• How to Design Programs
• How to Write Unmaintainable Code
• Kanban and Scrum - making the most of both
• Kanban for skeptics - Nick Oostvogels (Leanpub account or valid email requested)
• Microservices AntiPatterns and Pitfalls (PDF)
• Microservices vs. Service-Oriented Architecture (PDF)
• Migrating to Cloud-Native Application Architectures (email address requested) (PDF)
• Naked objects - Richard Pawson (PDF)
• OAuth - The Big Picture (email address requested)
• Object-Oriented Reengineering Patterns - S. Demeyer, S. Ducasse and O. Nierstrasz
• Practicing Domain-Driven Design - Part 1 - Scott Millett (Leanpub account or valid email requested)
• Reactive Microservices Architecture (email address requested)
• Reactive Microsystems: The Evolution of Microservices at Scale (email address requested)
• Scrum and XP from the Trenches
• Serverless apps: Architecture, patterns, and Azure implementation
• Serverless Design Patterns and Best Practices - Brian Zambrano (Packt account required)
• Shape Up - Stop Running in Circles and Ship Work that Matters - Ryan Singer (PDF)
• Site Reliability Engineering
• Software Architecture Patterns (email address requested, not required)
• Software Engineering for Internet Applications
• Source Making Design Patterns and UML
• Test Driven Development, Extensive Tutorial - Grzegorz Gałęzowski
• The Site Reliability Workbook - Betsy Beyer, Niall Richard Murphy, David K. Rensin, Kent Kawahara and Stephen Thorne
• Web API Design - Brian Mulloy (PDF)
• Working with Web APIs - Launch School
• Your API Is Bad - Paddy Foran

• Linux Standard Base
• UNIX - The POSIX Standard - IEEE Std 1003.1

• Building Blocks for Theoretical Computer Science - Margaret M. Fleck
• Category Theory for Computing Science (PDF)
• Category Theory for Programmers - Bartosz Milewski (PDF)
• Design of a Programmer - Prakash Hegade (PDF)
• Homotopy Type Theory: Univalent Foundations of Mathematics (PDF)
• Introduction to Computer Science - Prof. Subhashis Banerjee, IIT Delhi
• Introduction to Computing
• Introduction to Theory of Computation - Anil Maheshwari and Michiel Smid (PDF)
• Models of Computation - John E. Savage
• Practical Foundations for Programming Languages, Preview - Robert Harper (PDF)
• Principles of Programming Languages - Scott F. Smith
• Programming and Programming Languages - Shriram Krishnamurthi
• Programming in Martin-Löf's Type Theory - Bengt Nordstroem
• Programming Languages: Application and Interpretation (2nd Edition) - Shriram Krishnamurthi
• Programming Languages: Theory and Practice - Robert Harper (PDF)
• Semantics with Applications: A Formal Introduction - Hanne Riis Nielson, Flemming Nielson (PDF)
• Structure and Interpretation of Computer Programs
• Structure and Interpretation of Computer Programs
• The Black Art of Programming - Mark McIlroy
• The Craft of Programming - John C. Reynolds
• Think Complexity - - Allen B. Downey (2nd Edition) (PDF, HTML)

• Book of Speed - Stoyan Stefanov
• Designing for Performance - Lara Hogan
• High Performance Accelerated Websites - Anshul (HTML) (:construction: in process)
• High Performance Browser Networking - Ilya Grigorik
• Mature Optimization - Carlos Bueno (PDF)

• RESTful Web Services (PDF)

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