Not only Unity...

• MonoGame

  95 10,819 8.9 C#

  One framework for creating powerful cross-platform games.

  

https://github.com/MonoGame/MonoGame /

• nCine

  11 962 6.0 C++

  A cross-platform 2D game engine

  

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• raylib

  399 18,791 9.8 C

  A simple and easy-to-use library to enjoy videogames programming

RayLib (ZLIBL/C/Lua) https://github.com/raysan5/raylib

• jMonkeyEngine

  38 3,690 9.1 Java

  A complete 3-D game development suite written in Java.

  

• love

  258 4,378 9.7 C++

  LÖVE is an awesome 2D game framework for Lua.

  

Love2d (MIT/C++/Lua) https://github.com/love2d/love

• lumixengine_maps

  3 31 6.6 C++

  Map downloader for Lumix Engine

• stone-kingdoms

  7 - -

• InfluxDB

  www.influxdata.com sponsored

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• FNA

  86 2,513 8.5 C#

  FNA - Accuracy-focused XNA4 reimplementation for open platforms

  

MonoGame (MPL/С#) https://fna-xna.github.io/

• LWJGL

  72 4,583 8.9 Java

  LWJGL is a Java library that enables cross-platform access to popular native APIs useful in the development of graphics (OpenGL, Vulkan, bgfx), audio (OpenAL, Opus), parallel computing (OpenCL, CUDA) and XR (OpenVR, LibOVR, OpenXR) applications.

  

• cocos-engine

  4 5,306 9.8 C++

  Cocos simplifies game creation and distribution with Cocos Creator, a free, open-source, cross-platform game engine. Empowering millions of developers to create high-performance, engaging 2D/3D games and instant web entertainment.

  

• Cocos2d

  7 17,893 2.5 C++

  Cocos2d-x is a suite of open-source, cross-platform, game-development tools utilized by millions of developers across the globe. Its core has evolved to serve as the foundation for Cocos Creator 1.x & 2.x.

  

• Phaser

  182 35,792 9.6 JavaScript

  Discontinued Phaser is a fun, free and fast 2D game framework for making HTML5 games for desktop and mobile web browsers, supporting Canvas and WebGL rendering. [Moved to: https://github.com/phaserjs/phaser] (by photonstorm)

  

Phaser (MIT/JS) https://github.com/photonstorm/phaser

• BabylonJS

  63 22,456 10.0 TypeScript

  Babylon.js is a powerful, beautiful, simple, and open game and rendering engine packed into a friendly JavaScript framework.

  

• PixiJS

  116 42,496 9.9 TypeScript

  The HTML5 Creation Engine: Create beautiful digital content with the fastest, most flexible 2D WebGL renderer.

  

PixiJS (MIT/TypeScript) https://github.com/pixijs/pixijs

• The-Forge

  34 4,432 6.9 C++

  The Forge Cross-Platform Rendering Framework PC Windows, Steamdeck (native), Ray Tracing, macOS / iOS, Android, XBOX, PS4, PS5, Switch, Quest 2

  

• flixel

  20 1,890 9.1 Haxe

  Free, cross-platform 2D game engine powered by Haxe and OpenFL

  

• Kha

  14 1,455 8.6 C

  Ultra-portable, high performance, open source multimedia framework.

  

Kha (zlib/Haxe) https://github.com/Kode/Kha

• pixelbox

  1 457 10.0 JavaScript

  A sandbox framework to fast-prototype tile-based games in HTML5 and JavaScript (by cstoquer)

• SFML

  122 9,600 9.5 C++

  Simple and Fast Multimedia Library

  

SFML (zlib/C++) https://github.com/SFML/SFML

• ObEngine

  2 787 6.7 C++

  2D Game Engine with Lua Scripting made on top of SFML !

  

• Akhenaten

  1 123 9.9 C++

  An open source re-implementation of Pharaoh (1999) in the Julius/Augustus engine

Although SDL is not a full-fledged game engine, it's relatively easy to develop games with it. It's my weekend project, created using SDL + C++ + JavaScript for configuration (https://github.com/dalerank/Akhenaten)

• Allegro

  24 1,759 8.3 C

  The official Allegro 5 git repository. Pull requests welcome!

  

Allegro (zlib/plain C) https://github.com/liballeg/allegro5

• defold

  7 3,687 9.8 C++

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

  

• gb-studio

  126 8,121 9.8 C

  A quick and easy to use drag and drop retro game creator for your favourite handheld video game system

GB-Studio (MIT/C) https://github.com/chrismaltby/gb-studio

• Godot

  2,744 83,500 10.0 C++

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

  

• CRYENGINE_ReadMe

  1 93 2.9
  

• CryEngine

  1 52 10.0

  CRYENGINE is a powerful real-time game development platform created by Crytek. (by ValtoGameEngines)

  

• o3de

  64 7,350 9.9 C++

  Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D engine that enables developers and content creators to build AAA games, cinema-quality 3D worlds, and high-fidelity simulations without any fees or commercial obligations.

  

• FlaxEngine

  18 5,455 9.9 C#

  Flax Engine – multi-platform 3D game engine

  

Flax (MIT/C++) https://github.com/FlaxEngine/FlaxEngine

• Panda3D

  42 4,264 9.4 C++

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

  

Panda3D (MIT/C++) https://github.com/panda3d/panda3d

• Ogre 3D

  3 3,730 9.5 C++

  scene-oriented, flexible 3D engine (C++, Python, C#, Java)

  

OGRE (MIT/C++) https://github.com/OGRECave/ogre

• DagorEngine

  9 2,095 8.2 C++

  Dagor Engine and Tools source code from Gaijin Games KFT

  

• skylicht-engine

  1 591 9.1 C++

  Skylicht Engine is C++ Game Engine based on Irrlicht 3D. And my goal is to create a high-performance and lightweight Game Framework that can seamlessly function on both web and mobile platforms. This framework will be available to everyone for free.

  

https://sourceforge.net/p/irrlicht/code/HEAD/tree/ https://github.com/skylicht-lab/skylicht-engine

• UnrealEngine

  122 - -

• xray-16

  24 2,837 9.8 C++

  Improved version of the X-Ray Engine, the game engine used in the world-famous S.T.A.L.K.E.R. game series by GSC Game World. Join OpenXRay! ;)

  

• bevy

  574 32,210 9.9 Rust

  A refreshingly simple data-driven game engine built in Rust

  

• ceramic

  1 238 8.9 Haxe

  Cross-platform 2D framework written in Haxe that can export natively to desktop (windows, mac, linux), mobile (ios, android), web (js + webgl) and to unity projects

  

• Pygame

  148 6,937 9.1 C

  🐍🎮 pygame (the library) is a Free and Open Source python programming language library for making multimedia applications like games built on top of the excellent SDL library. C, Python, Native, OpenGL.

  

• dome

  4 465 4.8 C

  A lightweight game development environment where games can be written in Wren

  

• mach

  36 2,773 9.7 Zig

  zig game engine & graphics toolkit

  

• Arcade

  47 1,606 9.2 Python

  Easy to use Python library for creating 2D arcade games.

  

• ClanLib

  1 333 3.3 C++

  ClanLib is a cross platform C++ toolkit library.

• jngl

  2 215 9.2 C++

  Easy to use cross-platform 2D game library for C++

• Tetra

  6 885 4.2 Rust

  🎮 A simple 2D game framework written in Rust

• ursina

  5 2,088 9.6 Python

  A game engine powered by python and panda3d.

• tofu

  1 64 6.3 C

  Multiplatform lightweight 2D game-engine, retro-game inspired. Uses OpenGL through GLFW3. Scripted in Lua. Aiming zero run-time dependencies. (by tofuengine)

  

• ultraviolet

  1 536 7.7 C#

  The Ultraviolet Framework is a .NET game development framework written in C#. (by UltravioletFramework)

  

• macroquad

  56 2,774 7.8 Rust

  Cross-platform game engine in Rust.

• GDevelop

  147 5,713 9.8 JavaScript

  :video_game: Open-source, cross-platform game engine designed to be used by everyone.

• stencyl-engine

  19 188 0.0 Haxe

  Create Flash, HTML5, iOS, Android, and desktop games with no code with Stencyl. This is the source to Stencyl's Haxe-based engine.

  

• heaps

  21 3,125 9.7 Haxe

  Heaps : Haxe Game Framework

  

• microstudio

  2 865 7.6 JavaScript

  Free, open source game engine online

• TIC-80

  134 4,744 9.2 C

  TIC-80 is a fantasy computer for making, playing and sharing tiny games.

• SaaSHub

  www.saashub.com sponsored

  SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

  

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