Workbox : JavaScript Libraries for adding offline support to web apps.
hunt : Library to detect when DOM elements become visible and disappear on scroll.
Intern : Intern is a complete test system for JavaScript designed to help you write and run consistent, high-quality test cases for your JavaScript libraries a...
jsPDF : A library to generate PDFs in client-side JavaScript.
script.aculo.us : script.aculo.us provides you with
easy-to-use, cross-browser user
interface JavaScript libraries to make
your web sites and web applications fly.