loglevel : Minimal lightweight logging for JavaScript, adding reliable log level methods to wrap any available console.log methods
MooTools : MooTools is a compact, modular, Object-Oriented JavaScript framework designed for the intermediate to advanced JavaScript developer. It allows you to ...
rsvp.js : A lightweight library that provides tools for organizing asynchronous code
Namespace.js : Namespace.js is a small javascript script which provide namespacing utilities. It is framework independent. It also allows you to remotely include fil...
Protovis : Protovis composes custom views of data with simple marks such as bars and dots. Unlike low-level graphics libraries that quickly become tedious for vi...