Orx: Portable Game Engine
Zoomable user interface (ZUI) with file manager, file viewers and more
A cross-platform port of Hexen II game.
TX Library is a tiny graphics library for Win32 written in C++.
Open-source reimplementation of the original King's Bounty
PAK file editor for Quake engine games
3D video music media player lyrics subtitles etc...
A cross-platform interpreter for many point-and-click adventure games
realtime 3d surface rendering library
A cross-platform, 3D interpreter to play LucasArts' Lua-based games
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
A generic 2D engine for any kind of game
A basic 3D environment with a first-person POV
A mod for 0 A.D.
a realtime graphics library
Cross-platform reimplementation of AMOS BASIC (runtime)
easy programming language for 2d games