lowclass
JavaScript/TypeScript class inheritance tools.
teoria
Music theory for JavaScript
satie
A sheet music renderer for the web
34rth-javascript-core-oo
An node/browser library to support full inheritance, mixins, private, public and static variables, event driven programming (publishing/subscribing to instance events) and a global caching mechanism.
node-class
Javascript Class system (Object oriented). Support Interfaces, Classes, Extends/Implements.