When
A solid, fast Promises/A+ and when() implementation, plus other async goodies.
PreloadJS
PreloadJS makes preloading assets & getting aggregate progress events easier in JavaScript. It uses XHR2 when available, and falls back to tag-based loading when not.
Lazy.js
Like underscore.js, but lazier
Platform.js
A platform detection library that works on nearly all JavaScript platforms.
Alertify.js
JavaScript Alert/Notification System
Csso
CSS-optimizer
Sticky Kit
A jQuery plugin for creating smart sticky elements
Highland
High-level streams library for Node.js and the browser
Fluxible
A pluggable container for isomorphic flux applications
Redux Loop
A port of elm-effects and the Elm Architecture to Redux that allows you to sequence your effects naturally and purely by returning them from your reducers.
Pusher Js
Pusher Javascript library
Fast Memoize.js
:rabbit: Fastest possible memoization library
Stampit
Create objects from reusable, composable behaviors.
Steal
Gets JavaScript
Fast.js
Faster user-land reimplementations for several common builtin native JavaScript functions.
Libretaxi
LibreTaxi, free and open source Uber/Lyft alternative to connect passengers and drivers.
Loglevel
Minimal lightweight logging for JavaScript, adding reliable log level methods to wrap any available console.log methods