plugin-based RPG manager in C++ and Qt5
Madeline 2.0 Pedigree Drawing Engine (PDE)
Strong 2D & 3D graphics engine
Matlab interface to the Open Dynamics Engine (ODE)
Python 1.0 - 3.4 bytecode decompiler
Paintown is a 2d fighting game engine.
Virtual Camera representation using the Toric Space
Lua scripting engine for Windows
Can convert from/to many 3D mesh file formats
LUR is a Rebuild of Lego Universe created in Uneral 4.
A free and open 3d action game.
GUI frontend for the a full-text search engine namazu (www.namazu.org)
Mahasona engine is an open source game engine.