ProseMirror : In-browser structured text editing component. A toolkit for building rich-text editors on the web.
Web Forms : Web Forms 2.0 Cross-Browser Implementation
Rickshaw : Rickshaw is a JavaScript toolkit for creating interactive time series graphs.
Vex : Vex is a modern dialog library which is highly configurable, easily stylable, and gets out of the way. You'll love vex because it's tiny (6kb minified...
Timeline : Beautifully crafted timelines that are easy, and intuitive to use.
Rainbow is a code syntax highlighting library written in Javascript.
It was designed to be lightweight (1.4kb), easy to use, and extendable.
It is completely themable via CSS.