Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Free game engine for development of desktop, mobile, and web games
Cross-platform 2D and 3D game engine with modular architecture
Java/JavaFX/Kotlin Game Library (Engine)
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A modular Common Lisp game engine
Stride (formerly Xenko), a free and open-source cross-platform C# game
The multiplayer game engine
Vivid is a modern C++ 3D engine using OpenGL4+
3D C++ Game Engine - yet another open source game engine
Data-oriented and data-driven game engine written in Rust
Conceptual design of Light Fixed Wing Aircraft
realistic truck & car simulator, with OpenGL graphics
A small Game Engine project.