Phaser is a free and fast 2D game framework for making HTML5 games
Cross-Platform C++ 2D/3D game engine
Cross-platform 2D game engine focused on ultimate productivity
Cross-platform 2D and 3D game engine with modular architecture
A web-based IDE for HTML5 game development. Powered by Phaser
A dead simple 2D game engine for Go
Pymunk is a easy-to-use pythonic 2d physics library
OpenSoldat is a unique 2D (side-view) multiplayer action game
A game engine powered by python and panda3d
LayaAir is an open-source 2D/3D engine
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
Sandbox video game with a powerful physics engine
Fast JavaScript library for Delaunay triangulation of 2D points
A completely free, open-source, 2D game engine
Free game engine for development of desktop, mobile, and web games
Easy to use Python library for creating 2D arcade games
Multi-platform 2D and 3D game engine
3D and 2D game engine written in Rust
Real Time Strategy game engine supporting early Westwood classics
A high-performance, industry-standard 2D physics engine built on Box2D
A 2D rigid body physics engine for the web
Stride (formerly Xenko), a free and open-source cross-platform C# game
The Tiny JavaScript Game Engine That Can!