Photon : UI toolkit for building desktop apps with Electron.
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.
emotion : emotion is a high performance, lightweight css-in-js library that supports both string and object based styles.
stream.js : stream.js is a tiny stand-alone Javascript library that unlocks a new data structure for you: streams.
Band.js : An interface for the Web Audio API that supports rhythms, multiple instruments, repeating sections, and complex time signatures.
Namespace.js is a small javascript script which provide namespacing utilities. It is framework independent. It also allows you to remotely include files.