A set of 170+ Bootstrap based design blocks ready to be used to create clean modern websites.
pushState + ajax = pjax
A simple, in-browser, markdown-driven slideshow tool.
Animate on scroll library
Marko template engine
Navigation scripting & testing utility for PhantomJS and SlimerJS
HTML5 <audio> or <video> player with Flash and Silverlight shims that mimics the HTML5 MediaElement API, enabling a consistent UI in all browsers.
Date/time picker widget based on twitter bootstrap
A positioning engine to make overlays, tooltips and dropdowns better #hubspot-open-source
Light and responsive lightbox plugin with focus on performance.