Free (as in freedom) open source clone of the Age of Empires II engine :...
Gaming meets modern C++ - a fast and reliable entity component system (E...
Entitas is a super fast Entity Component System (ECS) Framework specific...
A fast entity component system (ECS) for C & C++
3D engine with modern graphics
3D C++ Game Engine - yet another open source game engine
zig game engine & graphics toolkit
A game engine with an emphasis on real-time cutting-edge solutions
Engo is an open-source 2D game engine written in Go.
Svelto ECS C# Entity Component System
Godex is a Godot Engine ECS library.
C++ Game Engine and Editor
A modern re-implementation of the classic DOS game Duke Nukem II
Lightweight, multi-platform, data-oriented game engine.
A continuation of the popular Artemis ECS framework