shine.js is a library for pretty shadows.
boxShadowand auto-prefixes if necessary
GridList is a drag and drop library for two-dimensional, resizable and responsive lists.
Tether includes the ability to constrain the element within the viewport, it's scroll parent, any other element on the page, or a fixed bounding box. When it exceedes those constraints it can be pinned to the edge, flip to the other side of it's target, or hide itself.
The event-driven nature together with MVC architecture of JointJS makes it easy to plug-in any backend application.
Slip.js is a tiny library for interactive swiping and reordering of elements in lists on touch screens.
Supports iOS Safari, Firefox Mobile, Chrome Mobile, Opera Mobile.
WordCount.js is a client-side JS library that counts bytes, words, lines chars, and calculates the longest line of a file. This library utilized the HTML5 File API.