A certain block game
UCI chess engine
Desktop/Android/HTML5/iOS Java game development framework
The game engine for everyone
Home theater software and entertainment hub for digital media
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Cocos simplifies game creation and distribution with Cocos Creator
Multi-platform 2D and 3D game engine
3D Engine c++
GemRB is a portable open-source implementation of the Infinity Engine
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
Orx: Portable Game Engine
Fltk applications developed by me
... the open-source glide computer
3D modeler, 3D game maker, 3D demo maker
Old style soccer game with many exciting features
Urho3D Game engine
2D Game Engine
Cross-platform 2D and 3D game engine
Character animation system for games and simulations.
A cross-platform interpreter for many point-and-click adventure games