Eqcss
EQCSS is a plugin that introduces Element Queries, Scoped CSS, a Parent selector, and responsive JavaScript to all browsers IE8 and up
Bind.js
bind.js - simple two way data binding to HTML and callbacks
Fastdom
Eliminates layout thrashing by batching DOM read/write operations
Bespoke.js
DIY Presentation Micro-Framework
jScrollPane
Pretty, customisable, cross browser replacement scrollbars
Jquery Waypoints
Waypoints is a small jQuery plugin that makes it easy to execute a function whenever you scroll to an element.
Jquery Sieve
Sieve is a jQuery plugin allows you to quickly add an interactive search filter to any block of content.
Turbolinks
Turbolinks makes navigating your web application faster
Wow
Reveal CSS animation as you scroll down a page
Interact.js
Drag and drop, resizing and multi-touch gestures with inertia and snapping for modern browsers (and also IE8+)
Veinjs
Injects CSS into the document (it's a perfectly legal procedure)
Viewport
Gets the dimensions of the Viewport and beyond.
Prefixfree
Break free from CSS prefix hell!
Dragula
:ok_hand: Drag and drop so simple it hurts
Isotope
An exquisite jQuery plugin for magical layouts. Enables filtering, sorting, and dynamic layouts.
Vissense
A utility library for observing visibility changes of DOM elements.
Gliojs
Exit popup easely. Detects if the mouse of a user leaves the viewport borders of your website