Open game and rendering engine packed into a JavaScript framework
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Dust3D is a cross-platform open-source 3D modeling software
Vivid3D is an open-source 3D engine with powerful 2D UI.
Jeopardy in HTML and JavaScript
Advanced map editor
Cross-Platform Level Editor for Doom3 and The Dark Mod
Growth-grammar related Interactive Modelling Platform
Vivid is a modern C++ 3D engine using OpenGL4+
LaTeX package to typeset material for the fifth edition of DnD 5
Featuring sliding puzzle of customised image and page link, etc.
lzdoom plus freedom
Rich HTML UI engine for UE4
3D .NET engine for Windows, Linux, Mac
Mahasona engine is an open source game engine.
A Space Master 2nd Edition Character Generator
simple 3D vehicle simulator done in GameMaker. Good control though
Open source, moddable game engine for the "Polygon Love 2" game
a game for all ramborgians
Advanced 2D/3D(CPU,GPU) Game Engine Library
Fructoïd is an opensource free naïve game for Android OS.
A 3D scene editor for Ogre in Purebasic
Safety in numbers.
A soul search, to unlock the mystery of who you are