Free game engine for development of desktop, mobile, and web games
Desktop/Android/HTML5/iOS Java game development framework
Code for Cicero, an AI agent that plays the game of Diplomacy
Multi-platform 2D and 3D game engine
A layer built on top of the Insight Toolkit (ITK)
Source code repository of the FreeOrion project
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Orx: Portable Game Engine
a parametric 3D CAD modeler
Random phenomena generator
A free Chess program for Windows with a large set of features
inputbox password WIN OSX GTK QT Console VCPKG C# Lua R Fortran Pascal
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Scanning Probe Microscopy Controller and Data Visualization Software
A 2D game engine and level editor
KlayGE is a cross-platform open source game engine
A cross-platform 2D game engine
scriptable game engine with built-in support for 2D graphics and sound
The Atomic Game Engine is a multi-platform 2D and 3D engine
2D ARPG Engine
A traditional top-down OpenGL car racing game
evolution for vegastrike SpaceSim/Combat/Trade game
2D game creation software