Javascript

UI Frameworks

+++++	Kendo UI	Complete Framework for HTML5 apps

Charting

+++++	Flot Charts	Attractive JavaScript plotting for jQuery
+++++	Peity	jQuery plugin that converts data to canvas
+++++	Highcharts JS	...
+++--	JqPlot	Plotting and charting plugin for the jQuery

Vector Graphics

++++-	Raphaël JS	...

Spreadsheet / Excel

++++-	SlickGrid	A lightening fast JavaScript grid/spreadsheet

Navigation / Menu / Tree

++++-	JQuery Superfish	jQuery menu plugin
++++-	jsTree	Cross browser tree component

Caroussel

++++-	jQuery Cycle Plugin	The jQuery Cycle Plugin is a slideshow plugin that supports many different types of transition effects.

Tooltips

++++-	JQuery Tipsy	Tooltips

Calendar

++++-	JQuery FullCalendar	Full-sized drag & drop event calendar (jQuery plugin)

HTML 5

++++-	html5shim	JavaScript shim for IE to recognise and style the HTML5 elements
+++--	Modernizr	Tests browser’s html5 capabilities and manages js dependancies