GUI for downloading/managing homebrew apps for video game consoles
Fast PlayStation 1 emulator for x86-64/AArch32/AArch64
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
RPG Maker 2000/2003 and EasyRPG games interpreter
3D Engine c++
Odamex is a free, cross-platform, modern client-server Doom engine
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
TX Library is a tiny graphics library for Win32 written in C++.
Zoomable user interface (ZUI) with file manager, file viewers and more
X3D is the open-standard format for 3D graphics scenes on the Web.
Maze creation, solving, exploration, and analysis
A free 3D game engine to create games and realtimes scenes for Windows
Small lightweight program to customize your keyboard
0 A.D. is a free, open-source, cross-platform real-time strategy game.
C++ lightweight cross-platform game engine
A modification for Janes USAF
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Vivid is a modern C++ 3D engine using OpenGL4+
OpenGL port of the classic 6dof 3D shooter Descent
DOOM / Heretic / Hexen source port with enhanced graphics and UI