Simple, easy to use, SRCDS RCON tool.
Unreal Engine 4 first-person criminal simulator.
Neo Modding API for Minecraft: Java Edition, based on Forge
Modifications to the Minecraft base files to assist in compatibility
DirectX 1-11 to OpenGL wrapper
The Snake Game written in JavaScript and CSS3!
Compact/ Chess Interchange Format
Easy YGOPro puzzle editor
XNA based game engine completely written in c#
Cross-platform C framework very compact libraries and tools.
2D game creation software
A multithreaded, test-driven electronics emulator for .net 4.0.
A generic 2D engine for any kind of game
3D Game engine
Modular Gaming Open Source Persistent Browser Based Game Framework
Just another online poker software, but open source for once.
C++ Framework for slot machine games