localForage : localForage is a handy library that improves the offline experience of your web app by using asynchronous storage (via IndexedDB or WebSQL where avail...
polyfill : polyfill makes web development less frustrating by selectively polyfilling just what the browser needs. Use it on your own site, or as a service.
Dropzone.js : DropzoneJS is an open source library that provides drag'n'drop file uploads with image previews.
The HTML5 Shiv : The HTML5 Shiv enables use of HTML5 sectioning elements in legacy Internet Explorer and provides basic HTML5 styling for Internet Explorer 6-9, Safari...
ClippyJS : Add Clippy or his friends to any website for instant nostalgia.
Modest Maps is a small, extensible, and free library for designers and developers who want to use interactive maps in their own projects.