3D game engine/framework in C, with Luajit and Python bindings now
Open source library for creative expression on the web, desktop, etc.
Pycraft is an open-source, OpenGL based game made in Python
C++ lightweight cross-platform game engine
Vivid3D is an open-source 3D engine with powerful 2D UI.
Data-oriented and data-driven game engine written in Rust
A 3D, fully concurrent game engine
3D game engine for C and C++
Zen3D is a 3D engine and editor for creating games