Modernizr
Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.
Js Cache
jsCache is a javascript library that enables caching of javascripts, css-stylesheets and images using my localStorage polyfill. This is especially useful when serving your website for mobile phones, which have limited HTTP caching available, but also speeds up your site in an ordinary web browser as it saves HTTP requests and loads all files asynchronously.
Boiler
Boiler is a utility library that makes every day tasks in JavaScript easier by providing over 115 methods that work on arrays, collections, functions, numbers, objects, and strings.
Davis.js
RESTful degradable JavaScript routing using pushState
Bootstrap Ajax
A library for adding declarative ajax functionality to your website
Rambda
Faster alternative to Ramda in just 10kB
Loglevel
Minimal lightweight logging for JavaScript, adding reliable log level methods to wrap any available console.log methods
Queen
A platform for running scripts on many browsers
Autolink Js
Tiny little tool to find URLs in a string of text and hyperlink them
Pilot
Pilot — multifunction JavaScript router.
Min Pub Sub
198 byte publish/subscribe messaging micro-framework
ifvisible.js
Checks if the current page is visible or not
Tock
Timer Object/Class. Kickass!
Buster
A powerful suite of automated test tools for JavaScript.
Knockout Projections
Knockout.js observable arrays get smarter
Fast.js
Faster user-land reimplementations for several common builtin native JavaScript functions.