All game developers are welcomed, spread the word!

Orx: Portable Game Engine

Game engine for MoonScript, in MoonScript

A book about LÖVE, Games and Lua.

A simple JavaScript framework for creating games and apps

A community-contributed, information hub to help others build games in Ruby.

Let's develop Unity 3D games in Ruby!

A C++ bridge to the Java Google Play Games Services SDK and Apple's Game Center for cocos2d-X.

What do you think about jQuery games?

Toolkit for writing fast games for the web

Various Unity3D components for 2D games. WIP

Meta is free and fast open source HTML5 game engine for making cross platform games, supports Canvas and WebGL rendering and Dopple for native compilation.

Hacks and tools for "Ni no Kuni" games

A back-end server for long-term games of Go

A simple JavaScript framework for creating games and apps

Tradução do livro Making games with python and pygame

A javaScript webApp for creating 2D Maps for Games.

The rulebook for games played by Aberystwyth Assassin

A list of popular/awesome videos games, add-on, maps, etc. hosted on GitHub. Any genre - text adventures, educational games...

A simple IRC trivia bot written in python using twisted | https://github.com/rawsonj/triviabot

Ask questions about the Helm game engine, or share your creations and meet other creators

Navigation engine for games and simulations

Matchmaking bot for Quake style games

A collection of mappings for enjoyable compatible controllers