Multi-Dimensional charting built to work natively with crossfilter rendered with d3.js
jQuery Mobile Framework
SVGO is a Nodejs-based tool for optimizing SVG vector graphics files.
HTML5 <audio> or <video> player with Flash and Silverlight shims that mimics the HTML5 MediaElement API, enabling a consistent UI in all browsers.
Keep multiple browsers & devices in sync when building websites. http://browsersync.io
For slim progress bars like on YouTube, Medium, etc
Automatically add a progress bar to your site. #hubspot-open-source
PouchDB is a pocket-sized database.
A fast & lightweight polyfill for min/max-width CSS3 Media Queries (for IE 6-8, and more)
lightweight jquery date selector with multi-language support
Delightful, performance-focused pure css loading animations.