Grapnel.js
A simple, lightweight library making it easy to create routes or run events based on a specific URL hashtag.
Modernizr
Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.
Csso
CSS-optimizer
Xsm
State Management made eXtraordinarily simple and effective for Angular, React, and Vue
Rill
:left_right_arrow: Universal web application framework.
Backbone Associations
Create object hierarchies with Backbone models; Respond to hierarchy changes using regular Backbone events.
History.js
History.js gracefully supports the HTML5 History/State APIs (pushState, replaceState, onPopState) in all browsers. Including continued support for data, titles, replaceState. Supports jQuery, MooTools and Prototype. For HTML5 browsers this means that you can modify the URL directly, without needing to use hashes anymore. For HTML4 browsers it will revert back to using the old onhashchange functionality.
Vis
Dynamic, browser-based visualization library
Rx Js
The Reactive Extensions for JavaScript
Ramda
:ram: Practical functional Javascript
Rambda
Faster alternative to Ramda in just 10kB
Fishbone.js
A super lightweight (½kb) JavaScript library with automatic method chaining, automatic context binding, event support and simple inheritance. c-{{{-<
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.
Imagesloaded
JavaScript is all like "You images done yet or what?"
Batman
Fighting Crime and Kicking Apps
Uranium
Universal css-in-js media queries for React Native and React
When
A solid, fast Promises/A+ and when() implementation, plus other async goodies.