is a simple but powerful JavaScript HTML5 canvas library that provides an interactive object model on top of the canvas element. It even includes an SVG-to-canvas (and vice versa) parser. You can create and populate objects on canvas, including images, complex shapes, text, and more.

Voxel.js

is an open source 3D game building toolkit. It makes it easier to create voxel games like Minecraft in the browser. It’s split into multiple components, so you can use just what you need instead of a huge, bloated game framework.

Game{Closure} DevKit

The makes it easier and faster to build games, with native speed. It’s 100% JavaScript, with battle-tested code that’s been deployed worldwide. It can be used with your current favorite text editor and browser, without the need for other specialized tools or downloads. And since it uses OpenGL for mobile games, they have native speed on Android and iOS.

Isogenic Game Engine

The is an advanced HTML5 multiplayer game engine that’s used by a number of big names, including the BBC. It includes 2D and isometric support, with particle emitters, tweening, and cell-based animation. And unlike other “multiplayer” game engines that just throw in a networking library, Isogenic has a more advanced and realtime multiplayer functionality than in any other HTML5 game engine out there.

Enchant.js

is a simple framework for building games and apps with HTML5 and JavaScript. It’s been used on over 1,000 games and apps already, and has extensive supporting documents. It’s object oriented, multi-platform, and event-driven, complete with an animation engine, WebGL support, a content library, and more.

Wade Game Engine

The makes it easy to create games for desktop and mobile devices, and is built to perform well on either. Wade has a modular architecture so you can quickly create whatever type of game you need. It has a base module for flexibility, a physics module for games that need them, an isometric model for RPG and strategy games, and more.

LycheeJS

is a HTML5 and native OpenGL game engine for embedded, console, mobile, server, and desktop games. It supports responsive layouts, and includes an effect and tween engine, Verlet physics engine, a particle engine, a sprite animation engine, a bitmap font engine, and much more. It also includes websockets technology for multiplayer games.

Heatmap.js

is a simple library for creating JavaScript heatmaps using HTML5 canvas. It’s the most advanced heatmap visualization library on the web, with a very lightweight footprint (less than 3kB gzip), and has premium support available.

Chart.js

lets you create simple, clean, engaging charts using canvas and JavaScript. There are six chart types available, it’s dependency free, responsive, modular, and interactive.