Improved Quake III Arena engine
Orx: Portable Game Engine
inputbox password WIN OSX GTK QT Console VCPKG C# Lua R Fortran Pascal
4kb procedural graphics using GLSL
Atari 2600, C64, Python, 3D engines and rock'n roll
PHIGS (Programmer's Hierarchical Interactive Graphics System)
A graphics engine + toolkit.
Access to Irrlicht Engine SDK from assembler, C, Python, Basic, Pascal
Game creation engine with built-in BASIC interpreter.