The Open Software & Tools Directory

Stride (formerly Xenko), a free and open-source cross-platform C# game engine.

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

3D engine with modern graphics

Flax Engine – multi-platform 3D game engine

:video_game: :game_die: A wonderful list of Game Development resources.

The Ren'Py Visual Novel Engine

Piccolo (formerly Pilot) – mini game engine for games104

a modern & lightweight HTML5 game engine

Defold is a completely free to use game engine for development of desktop, console, mobile and web games.

Redot Engine – Multi-platform 2D and 3D game engine

Godot Engine official documentation

2D JavaScript Physics Engine

Powerful, mature open-source cross-platform game engine for Python and C++, developed by Disney and CMU

Lightweight and modular C++11 graphics middleware for games and data visualization

Java / JavaFX / Kotlin Game Library (Engine)

zig game engine & graphics toolkit - mirror of https://code.hexops.com/hexops/mach

Game engine

Rust library to create a Good Game Easily

Cross-platform game engine in Rust.

Tiny fast HTML5 game engine with many features and no dependencies.

A fast, scalable, distributed game server engine/framework for C++, include the actor library, network library, can be used as a real time multiplayer game engine ( MMO RPG/MOBA ), which support C#/L

Egret is a brand new open mobile game and application engine which allows you to quickly build mobile games and apps on Android,iOS and Windows.

A powerful free cross-platform RTS game engine. - Report issues at https://springrts.com/mantis/

The multiplayer game engine