Eqcss
EQCSS is a plugin that introduces Element Queries, Scoped CSS, a Parent selector, and responsive JavaScript to all browsers IE8 and up
Tether
A positioning engine to make overlays, tooltips and dropdowns better #hubspot-open-source
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
Hapi
The Simple, Secure Framework Developers Trust
Design Blocks
A set of 170+ Bootstrap based design blocks ready to be used to create clean modern websites.
React Virtualized
React components for efficiently rendering large lists and tabular data
Sizzle
A sizzlin' hot selector engine.
jQuery.lazy
A lightweight, fast, feature-rich, powerful and highly configurable delayed content, image and background lazy loading plugin for jQuery & Zepto.
Interact.js
Drag and drop, resizing and multi-touch gestures with inertia and snapping for modern browsers (and also IE8+)
Gliojs
Exit popup easely. Detects if the mouse of a user leaves the viewport borders of your website
Masonry
Layout elements in a grid, like a mason fitting stones in a wall
Tire
Tire is a lightweight JavaScript library for modern browsers
jQuery Evergreen
Small & fast DOM and event library for modern browsers.
Do Mtastic
Small & fast DOM and event library for modern browsers.
jQuery.nicescroll
nicescroll plugin for jquery - scrollbars like iphone/ipad
Laconic
Sane DOM Generation