Atari 2600, C64, Python, 3D engines and rock'n roll
Realtime 3D engine for game development
Build virtual reality experiences with A-Frame and React
Game engine allows you to create own MMORPG
Perl bindings to the Modern OpenGL API
3D .NET engine for Windows, Linux, Mac
Rich HTML UI engine for UE4
3D simulation library
A game engine written in the D programming language
a very lightweight advanced terrain-rendering and 3D map rendering sys
A Flash Molehill (Stage3D) GPU accelerated 2D game engine
Free-roaming 3D racing game featuring advanced terrain rendering
Plugin based multi-purpose dev tool.
Cross-platform C framework very compact libraries and tools.
PHIGS (Programmer's Hierarchical Interactive Graphics System)
Performance enhancement API for RPG Maker XP, VX, VXA.