Scriptable Headless WebKit
Fast, flexible, and lean implementation of core jQuery designed specifically for the server.
:ok_hand: Drag and drop so simple it hurts
Reveal CSS animation as you scroll down a page
A positioning engine to make overlays, tooltips and dropdowns better #hubspot-open-source
Turbolinks makes navigating your web application faster
Drag and drop, resizing and multi-touch gestures with inertia and snapping for modern browsers (and also IE8+)
Layout elements in a grid, like a mason fitting stones in a wall
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
DOMPurify - a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMPurify works with a secure default, but offers a lot of configurability and hooks. Demo:
Break free from CSS prefix hell!
Eliminates layout thrashing by batching DOM read/write operations
DIY Presentation Micro-Framework
Pretty, customisable, cross browser replacement scrollbars
bin-packing layout library