Prototype : Easy Ajax and DOM manipulation for dynamic web applications
The HTML5 Shiv : The HTML5 Shiv enables use of HTML5 sectioning elements in legacy Internet Explorer and provides basic HTML5 styling for Internet Explorer 6-9, Safari...
emotion : emotion is a high performance, lightweight css-in-js library that supports both string and object based styles.
xui.js : A super micro tiny DOM library for authoring HTML5 mobile web applications.
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...
stream.js is a tiny stand-alone Javascript library that unlocks a new data structure for you: streams.