meSing.js : meSing.js is a JavaScript singing synthesis library that uses the Web Audio API's DSP capabilities in conjunction with the meSpeak.js speech synthesis...
Tracery : A story-grammar generation library for javascript. Write grammar objects, get generative stories.
Wave.js : Audio visualizer library for javascript. Create dynamic animations that react to an audio file or audio stream.
Parsley.js : Javascript forms validation.
Powerful, UX aware & Dead simple.
emotion : emotion is a high performance, lightweight css-in-js library that supports both string and object based styles.
A simple library for handling keyboard shortcuts in Javascript.