TraceKit : Not all browsers support stack traces on error objects, but TraceKit squeezes out as much useful information as possible and normalizes it.
nlp_compromise : nlp_compromise does NLP in the browser. It's a handy, and not overly-fancy tool for understanding, changing, and playing with english. We've also got ...
enquire.js : A lightweight, pure JavaScript library for responding to CSS media queries.
TCPDF : TCPDF is a FLOSS PHP class for generating PDF documents.
Web Forms : Web Forms 2.0 Cross-Browser Implementation
A library to generate PDFs in client-side JavaScript.
