KlayGE is a cross-platform open source game engine with plugin-based architecture.

4X Space Strategy game Star Ruler 2's open source distribution.

Tiny OpenGL Wrapper / 3D Engine in C++

A Cool High Performance Game Engine

A port of Babylon.js to C++

game engine and framework written in luajit

A versatile real-time platform for making 3D, 2D games and apps.

开源Web3D低代码平台，一条龙可视化搭建Web3D应用、编辑器、引擎，共建开放互助的Web3D生态

Gloomy Dungeons II - a continuation of old-school 3d-shooter.

[2013, incomplete] the goal back then: "a Go-native, modern-OpenGL real-time 3D rendering engine" ➜ I think it's still a solid *basis* for one; the real "meat" is in `___old2013` ➜ project stalled out as my focus shifted elsewhere from 2014

Old-school 3D shooter for android. Wolf-like engine, but *not* raycasting.

Vue wrapper for zDog

HXEngine is a cross-platform open source game engine developed by personal

lunokWatch (lilygo twatch2020 series)

Desktop/Android Python game development framework on top of Vulkan API

Vulkan-based graphics framwork designed for game development and graphics applications on Linux.

Example projects for GateEngine, a cross platform game engine for Swift developers.

3D Graphics Engine For Games | C++ OpenGL 4.1

Brakeza3D is a OpenSource Engine3D for old school lovers

Neta from <NEW GAME!> Sakura Nene's game engine.