Tracery : A story-grammar generation library for javascript. Write grammar objects, get generative stories.
jsfx : This is a javascript library (with frontend) for sound effect generation.
rsvp.js : A lightweight library that provides tools for organizing asynchronous code
Slate : Slate is a completely customizable framework for building rich text editors.
Slate lets you build rich, intuitive editors like those in Medium, Dropbo...
Ender : Ender is a full featured package manager for your browser.
It allows you to search, install, manage, and compile front-end JavaScript packages and the...
base2 is a lightweight library that irons out all the annoying differences in JavaScript implementations. It provides the additional functionality from JavaScript 1.6+ that only Mozilla browsers implement.