A simple Text Adventure Engine.
Mighty 34th century meka action from TeamXbow
https://github.com/horde3d/Horde3D
cross-platform 2d game engine
"Kenny" is an XBoard/WinBoard chess engine based on "Winglet"
"Abysmal Depths" is a simple C++-based text adventure game engine.
Cross Engine is game engine for Windows, Mac, Linux and Android
Point-and-click 2D game engine
9-Octave Chromatic Tuner
a realtime graphics library
Cross-platform reimplementation of AMOS BASIC (runtime)
GPUmat is a C/C++ GPU engine for Matlab based on NVIDIA CUDA.
A minecraft clone thing on the cube 2 engine