Invisible
Invisible.js: Reusable models for the client and the server
Kefir
A Reactive Programming library for JavaScript
Loglevel
Minimal lightweight logging for JavaScript, adding reliable log level methods to wrap any available console.log methods
Tock
Timer Object/Class. Kickass!
Modules Webmake
Bundle CommonJS/Node.js modules for web browser
Theory
Abstraction layer for cross platform JavaScript.
Davis.js
RESTful degradable JavaScript routing using pushState
Bootstrap Ajax
A library for adding declarative ajax functionality to your website
Queen
A platform for running scripts on many browsers
Eve.js
A <3kb JavaScript file providing three simple methods to organize code into CSS namespaces which magically restrict code to the current context, allowing for dramatic reductions to code size and development time.
Hermes.js
Message and Error logger implementation
Lunr.js
A bit like Solr, but much smaller and not as bright
Connective
agent-based reactive programming library for typescript
Sticky Kit
A jQuery plugin for creating smart sticky elements
When
A solid, fast Promises/A+ and when() implementation, plus other async goodies.
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.
Curl
A small, fast module and resource loader with dependency management. (AMD, CommonJS Modules/1.1, CSS, HTML, etc.)