I am looking for a javascript library which looks like this, having multiple widgets on the dash board.
I am sure there is a library, because,I remember using it but can't remember the name and googling for few days didn't help..
Please help me find such a library.
Thanks for your time, I appreciate it.
The application you linked (Piwik) likely implements the Dashboard and its Widgets by using jQuery UI (http://jqueryui.com/).
jQuery UI contains ready-made widgets, like Accordion, Autocomplete, Datepicker, etc. It also provides you with a framework for writing your own widgets. For more details on this facet, take a look at jQuery UI's Widget Factory (http://jqueryui.com/widget/).
For the dashboard part, you could try something like gridster.js (http://gridster.net/).