MagJS - Modular Application Glue
Gets the dimensions of the Viewport and beyond.
A positioning engine to make overlays, tooltips and dropdowns better #hubspot-open-source
Drag and drop, resizing and multi-touch gestures with inertia and snapping for modern browsers (and also IE8+)
A lightweight, fast, feature-rich, powerful and highly configurable delayed content, image and background lazy loading plugin for jQuery & Zepto.
library agnostic, extensible DOM utility
E+lements is a minimal DOM Library for the prime framework.
Sieve is a jQuery plugin allows you to quickly add an interactive search filter to any block of content.
An absurdly fast CSS selector engine.
nicescroll plugin for jquery - scrollbars like iphone/ipad