Scriptable Headless WebKit
:ok_hand: Drag and drop so simple it hurts
Fast, flexible, and lean implementation of core jQuery designed specifically for the server.
A positioning engine to make overlays, tooltips and dropdowns better #hubspot-open-source
Reveal CSS animation as you scroll down a page
Turbolinks makes navigating your web application faster
Layout elements in a grid, like a mason fitting stones in a wall
Drag and drop, resizing and multi-touch gestures with inertia and snapping for modern browsers (and also IE8+)
An exquisite jQuery plugin for magical layouts. Enables filtering, sorting, and dynamic layouts.
Highly customizable vanilla JS tooltip/popover library
nicescroll plugin for jquery - scrollbars like iphone/ipad
Break free from CSS prefix hell!
DIY Presentation Micro-Framework
Eliminates layout thrashing by batching DOM read/write operations
Pretty, customisable, cross browser replacement scrollbars
bin-packing layout library