Quake Developers Pages
Information and resources for quake developers
http://www.gamers.org/dEngine/quake/

Game Developer Magazine
A monthly publication that delivers technical, how-to articles
http://www.gdmag.com/

Gamasutra
The Art and Science of making Games.
http://www.gamasutra.com/

Exaflop
A programmers' resource with resources related to graphics and games programming.
http://www.exaflop.org/

Reprints of Works by Diana Gruber
Articles and book chapters by Diana Gruber on the subject of game design and programming.
http://www.fastgraph.com/diana.html

East Coast Games
Dedicated to training new programmers and to making great games, tutorials on C/C++, Java and DirectX, several games written for Windows (Freeware).
http://www.eastcoastgames.com/

Paul Hsieh
Source code, tips, and tricks.
http://www.azillionmonkeys.com/qed/tech.shtml

Irt.org
Design challenges, tutorials, and articles on coding design.
http://www.irt.org/games/

Zingtech Computer Solutions
Development site with tutorials, an introduction to DirectX and a game idea center. Also Allegro game programming library sections. Books. Links.
http://zingtech.com/features/gamedev/

Mappy for PC (DOS and Win95)
A utility for creating flexible 'maps' for tile based 2D games (scrolling shoot-em-ups, or 8-way scrolling adventures, whatever).
http://www.geocities.com/SiliconValley/Vista/7336/robmpy.htm

SoftLight Development
Lots of programs and source code, development tools, Direct X examples, and killer links. With a Windows focus.
http://thunder.prohosting.com/~sssmoker/

Impacto
A tool to make games and multimedia applications.
http://scorpius.spaceports.com/~esanto/

Rise Game Development Home Page
Tutorials on games and QBasic along with developer tools downloads.
http://www.angelfire.com/games2/Rise/

zstar
An extensible, distributed system for game development, consisting of an abstract game client, and a game server to which players connect to play games against other players or alone.
http://zstar.sourceforge.net/

Games Research
Materials from, and links to resources related to, the Siggraph 2000 course "Games Research: the Science of Interactive Entertainment"
http://www.red3d.com/siggraph/2000/course39/

GarageGames.com
An online game development community and resource center, keeping independent and professional developers connected to their peers, the industry and cutting edge information, tools and code.
http://www.garagegames.com/

Game Algorithms
Algorithms, source code and references.
http://www.azillionmonkeys.com/qed/gamealgorithms.html

Game Tutorials
Over one hundred tutorials in C/C++ for the beginning programmer.
http://www.gametutorials.com/

GameDev.net
Featuring a huge reference library and weekly interviews of professionals inside the industry. Participate in a public game development project.
http://www.gamedev.net/

The Playground Project
Building computer environments for 4-8 year-olds to play, design, and create games. A playground is a place to play with rules not just by them.
http://www.ioe.ac.uk/playground/frame_n.htm

RPG game programming page
Page related to RPG programming. Has a freeware game (not finished, but in development) w/ all its sources
http://www.geocities.com/SiliconValley/Hub/5282/eng/

DevMaster.net
A game development site that provides articles, 3D engines database, a wiki, daily news updates, and a discussion forum.
http://www.devmaster.net/

Games++ Megasite
Game programming, online games, cheats, tutorials, references, Direct X, C/C++, and Java.
http://www.gamespp.com/

How to Start a Gameproject/Gamedevelop Company
Article from a Swedish programmer. Also related links.
http://hem.bredband.net/leiber/gamedev/

Daneu, Ales
AD Snooker and Briskola games with C++ sources.
http://www.angelfire.com/games4/ales/

Web Game Builder
Free resource for anyone wishing to write online games. Offering tutorials, forums and linking to member games.
http://www.webgamebuilder.com/

Games Creation Resources
Game creation programs for non-programmers.
http://www.ambrosine.com/resource.html

XDev.ru
Games development articles and tutorials. Game industry news.
http://www.xdev.ru/dxgp/rgd_news_e.asp

GameProgrammer.org
Contains tutorials about game development featuring OpenGL, Direct3D and Win32 SDK programming.
http://gameprogrammer.org/

GGD - Global Game Developer
Provides tools and knowledge needed to create and distribute games. Including tutorials, tips, downloads and books.
http://www.geocities.com/gcgameruk/

PC Game Programming Explorer
Book by Dave Roberts that takes readers inside the world of PC game programming and reveals the essential techniques to make game programming easy and fun.
http://www.droberts.com/pcgpex/pcgpex.htm

The Game Programming Wiki
Game programming tutorials and source code.
http://gpwiki.org/

Toymaker
Aimed mainly at the new games programmer. It contains notes and answers to common questions with examples in C++ and DirectX. Resources. T2, a free terrain texture generation tool.
http://www.toymaker.info

Cylinder Based Collision Detection
A game programming tutorial on Cylinder based collision detection and response.
http://spiritking.tripod.com/cdtut.htm

3Ddrome
News, tutorials, sample code, links related to 3D graphics and game development.
http://www.3ddrome.com/

A Critical Look at Programming Languages
An article by Tim Sweeney on the evolution and future of programming languages as it relates to game development.
http://archive.gamespy.com/legacy/articles/devweek_b.shtm

C# Game Dev
A set of computer RPG programming tutorials using C# and DirectX. Regular articles on the creation of roleplaying games. Topics including Lua scripting, NPCs, maps.
http://einfall.blogspot.com/

Nuclex
A .NET game development community site with technical articles, tutorials and code snippets, focusing on game creation with the Microsoft XNA framework.
http://www.nuclex.org

Gepard Studio
Downloads for game programming, along with some Java, Linux, DOS and Windows games.
http://gepardstudio.4ezi.com/

Amit's Game Programming Information
Descriptions of algorithms for artificial intelligence, path finding, game design, objects, hexagonal tiles, threads, and text games.
http://www-cs-students.stanford.edu/~amitp/gameprog.html

Simple Game Engine
Information, screenshots and downloads for Simple Game Engine (freeware) enabling to games using a definition language.
http://www.geocities.com/djterrier/sgeindex.html

flipCode
Articles, coding techniques, and interviews relating to Game programming.
http://www.flipcode.com/

Gamedev.org
Game development discussion forum.
http://www.gamedev.org/

Xtreme Games
Free tools and source code and an offer to sign up new developers for joint ventures for a general pooling of resources.
http://www.xgamestation.com/