Tock
Timer Object/Class. Kickass!
Sammy
Sammy is a tiny javascript framework built on top of jQuery, It's RESTful Evented Javascript.
Postal.js
JavaScript pub/sub library supporting some advanced subscription features, plus message capture and replay
Path.js
Simple, lightweight routing for web browsers
Backbone Marionette
Make your Backbone.js apps dance with a composite application architecture!
Jsviews
Interactive data-driven views, built on top of JsRender templates
Diagram
JS tool for making node graphs. Inspired by dependency graph
Abaaso
A modern, lightweight enterprise-class RESTful JavaScript application framework.
Web Rx
WebRx is a Javascript MVVM-Framework built on ReactiveX for Javascript (RxJs) that combines functional-reactive programming with Observable-driven declarative Data-Binding, Templating and Client-Side Routing.
Modules Webmake
Bundle CommonJS/Node.js modules for web browser
Black Hole.js
Renders black hole gravitational lensing effects in an image canvas using WebGL, glfx.js, and numeric.js
Q
A tool for making and composing asynchronous promises in JavaScript
Stately.js
Stately.js is a JavaScript based finite-state machine (FSM) engine for Node.js and the browser.
Blizzard.js
A promise-based Node.JS library for the Blizzard Battle.net Community Platform API
Angular History
A history service for AngularJS. Undo/redo, that sort of thing. Has nothing to do with the "back" button, unless you want it to.
UI Router
The de-facto solution to flexible routing with nested views
Flakes
Flakes is an Admin Template Framework. A combination of CSS Libraries, JavaScript Libraries and Design files that help you build business tools very quickly.