Bind.js
bind.js - simple two way data binding to HTML and callbacks
Persist State
jQuery Ui widget that will transparently save the state of checkboxes, inputs, selects, etc in localStorage, restoring these on the user's next visit to the page.
Fragment.js
A tiny tool for easily loading html fragments and templates
Eqcss
EQCSS is a plugin that introduces Element Queries, Scoped CSS, a Parent selector, and responsive JavaScript to all browsers IE8 and up
Elements
E+lements is a minimal DOM Library for the prime framework.
Porthole
A proxy to safely communicate to cross-domain iframes in javascript
Double
jQuery plugin for hiring doubles
Scrob Master
Master your scroll events.
jScrollPane
Pretty, customisable, cross browser replacement scrollbars
Sizzle
A sizzlin' hot selector engine.
Egjs Infinitegrid
A module used to arrange card elements including content infinitely on a grid layout.
Veinjs
Injects CSS into the document (it's a perfectly legal procedure)
Viewport
Gets the dimensions of the Viewport and beyond.
Html
A simple, extensible way to work directly with the DOM.
Tapestry5 jQuery
Tapestry 5 jQuery integration. Fully replace Prototype and Scriptaculous with jQuery with as less as possible compatibility issues
Masonry
Layout elements in a grid, like a mason fitting stones in a wall
Hapi
The Simple, Secure Framework Developers Trust