Phaser is a free and fast 2D game framework for making HTML5 games
Free, cross-platform 2D game engine powered by Haxe and OpenFL
Cross-Platform C++ 2D/3D game engine
Cross-platform 2D game engine focused on ultimate productivity
Classic 2D side-scrolling platformer game
Cross-platform 2D and 3D game engine with modular architecture
A web-based IDE for HTML5 game development. Powered by Phaser
OpenSoldat is a unique 2D (side-view) multiplayer action game
A dead simple 2D game engine for Go
A game engine powered by python and panda3d
LayaAir is an open-source 2D/3D engine
Pymunk is a easy-to-use pythonic 2d physics library
Cocos simplifies game creation and distribution with Cocos Creator
An easy to use 2D HTML5 game engine written in TypeScript
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
A completely free, open-source, 2D game engine
A J2ME emulator for Android
Free game engine for development of desktop, mobile, and web games
3D and 2D game engine written in Rust
Multi-platform 2D and 3D game engine
Real Time Strategy game engine supporting early Westwood classics
The Tiny JavaScript Game Engine That Can!
A high-performance, industry-standard 2D physics engine built on Box2D
Easy to use Python library for creating 2D arcade games
2D JavaScript Physics Engine