Asphyre is a cross-platform framework for Delphi and FreePascal.
Event driven concurrent framework for Python
Multi-threaded game engine for Android
MMIM - Unlimited ideas for Mario Maker Levels!
Open-source, cross-platform, C++ game engine for creating 2D/3D games
3D .NET engine for Windows, Linux, Mac
Gaming library
Open Game Bootstrap
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
c# lua bind with unity3d project for game development
Cross platform Game Creation Software
Gorgon Game Engine (GGE) is a C++ game engine that handles many tasks.
Gives agents personality, moods, emotions and emotional attachments.
Cross-platform C framework very compact libraries and tools.
A generic 2D engine for any kind of game
A basic 3D environment with a first-person POV
TurboSphere is an easy to learn and powerful JS based game engine.
A mobile tower 3D tower defense/defend the flag game