You can make it - Open Source MMORPG Platform
Enables Roblox developers to use professional software tools
Desktop/Android/HTML5/iOS Java game development framework
A simple and easy-to-use library to enjoy videogames programming
Open source library for N64 development
Open source library for creative expression on the web, desktop, etc.
Gideros Release version
CTFs as you need them
Self-hosted CMS platform based on the Laravel PHP Framework
An isometric arcade-style game of skill, puzzles and exploration
Examples of procedural geometry for Unity3D C#
Orx: Portable Game Engine
Arianne is an engine to develop multiplayer online games like Stendhal
JavaScript framework to build game engines, games, emulators and apps
Ze Text Adventure game Builder : Create as you play !
Vivid3D is an open-source 3D engine with powerful 2D UI.
Cinema Enters Game Console
Sdk library for creating 2048 game in c#.
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
Modern 3D engine and IDE written using C# and C++.
A cross platform Lua based game engine
A distributed graph deep learning framework.
8-bit Graphical API for Java
Free and Open Game Programming Language for Windows and GNU/Linux