Wow
Reveal CSS animation as you scroll down a page
List
Do you want a 3 KB (gzipped&minified) cross-browser native JavaScript that makes your plain HTML lists and tables super flexible, searchable, sortable and filterable? Yeah! Do you also want the possibility to add, edit and remove items by dead simple templating? Hell yeah!
Perfect Scrollbar
Tiny but perfect jQuery scrollbar plugin
Pikaday
A refreshing JavaScript Datepicker — lightweight, no dependencies, modular CSS
Fuelux
Extends Twitter Bootstrap with additional lightweight JavaScript controls. Easy to install, customize, update, and optimize. All functionality covered by live documentation and unit tests.
Chai
BDD / TDD assertion framework for node.js and the browser that can be paired with any testing framework.
Respond
A fast & lightweight polyfill for min/max-width CSS3 Media Queries (for IE 6-8, and more)
Cycle Core
A fully reactive JavaScript framework for Human-Computer Interaction
Typed.js
A jQuery typing animation script.
Offline
Automatically display online/offline indication to your users. #hubspot-open-source
Page.js
Micro client-side router inspired by the Express router (~1200 bytes)
Marko
Marko template engine
Snap.svg
The JavaScript library for modern SVG graphics.
Noty
noty - jquery notification plugin
Lazysizes
High performance and SEO friendly lazy loader for images (responsive and normal), iframes and more, that detects any visibility changes triggered through user interaction, CSS or JavaScript without configuration.
Timeline JS
TimelineJS: A Storytelling Timeline built in JavaScript.
Synaptic
architecture-free neural network library for node.js and the browser