Phaser is a free and fast 2D game framework for making HTML5 games
HTML5 Phigros chart player/simulator
Solar2D Game Engine main repository (ex Corona SDK)
Open source HTML5 game framework that offers WebGL and Canvas
HTML5 Canvas Tower Building Game
An easy to use 2D HTML5 game engine written in TypeScript
Desktop/Android/HTML5/iOS Java game development framework
A fresh & lightweight javascript game engine
A web-based IDE for HTML5 game development. Powered by Phaser
The game engine for everyone
3D game engine/framework in C, with Luajit and Python bindings now
Free, cross-platform 2D game engine powered by Haxe and OpenFL
The HTML5 Creation Engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
Cross-platform game engine in Rust
Python MUD/MUX/MUSH/MU* development system
LayaAir is an open-source 2D/3D engine
Client-side JS platform for artists, designers and students to express
The Ren'Py Visual Novel Engine
Free game engine for development of desktop, mobile, and web games
An HTML5 Game Framework
2D JavaScript Physics Engine
A node.js plugin to integrate nw.js/electron games with steamworks
Compiler from Go to JavaScript for running Go code in a browser