Frappe Charts : GitHub-inspired simple and modern charts for the web with zero dependencies.
loglevel : Minimal lightweight logging for JavaScript, adding reliable log level methods to wrap any available console.log methods
Rickshaw : Rickshaw is a JavaScript toolkit for creating interactive time series graphs.
TraceKit : Not all browsers support stack traces on error objects, but TraceKit squeezes out as much useful information as possible and normalizes it.
dancer.js : dancer.js is a high-level audio API, usable with both Mozilla's Audio Data API and Webkit's Web Audio API with flash fallback, designed to make sweet ...
A library to generate PDFs in client-side JavaScript.