Photon : UI toolkit for building desktop apps with Electron.
Mousetrap : A simple library for handling keyboard shortcuts in Javascript.
Band.js : An interface for the Web Audio API that supports rhythms, multiple instruments, repeating sections, and complex time signatures.
store.js : localStorage wrapper for all browsers without using cookies or flash. Uses localStorage, globalStorage, and userData behavior under the hood.
Sammy.js : Sammy is a tiny javascript framework built on top of jQuery, It's RESTful Evented Javascript.
A lightweight library that provides tools for organizing asynchronous code