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 (ECS) and much more

Entitas is a super fast Entity Component System (ECS) Framework specifically made for C# and Unity

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

Game engine with an emphasis on architectural quality and performance

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

Realtime 3D Game-Engine with a focus on space sim. Written in C++ 14

🚀Actors is a framework empowering developers to make better games faster on Unity.

A developing game server framework,based on Entity Component System(ECS).

Entity Component System focused on usability and speed.

Entity Component System framework aiming for syntax and usage simplicity with maximum performance for game development.