Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Cross-platform 2D and 3D game engine with modular architecture
A game engine powered by python and panda3d
3D and 2D game engine written in Rust
Cocos simplifies game creation and distribution with Cocos Creator
A modular Common Lisp game engine
3D game engine/framework in C, with Luajit and Python bindings now
Desktop/Android/HTML5/iOS Java game development framework
A charting and data visualization library for Unity
Open source library for creative expression on the web, desktop, etc.
Gideros Release version
DeSmuME is a Nintendo DS emulator
3D Engine c++
3D modeler, 3D game maker, 3D demo maker
Various things for PSX (PlayStation 1, PSone)
A planetarium software that shows a 3D simulation of the night sky
Game engine supporting many 3D/2D formats and graphic effects
realistic driving simulation + functions for 2D/3D graphics
Game library for Pascal
A cross-platform port of Hexen II game.
3D OpenGL dungeon game using Ada: a tribute to Narbacular Drop
3D driving simulation based on Open Dynamics Engine
Zoomable user interface (ZUI) with file manager, file viewers and more
Vivid3D is an open-source 3D engine with powerful 2D UI.