gmap3 is a jquery plugin which allows many manipulation of the google map API version 3.
OpenJS Grid is the easiest jQuery Data Grid ever. With very little work you can have a data grid that can do everything from sorting and searching to complex database queries.
Create A Tabbed Content Rotator using jQuery and jQuery UI, as seen on many magazine sites. This script automatically changes between the tabs like a slideshow.
MooDataTable is, as the name suggests, a Data table for MooTools 1.2. Some of its features include smart pagination, column sorting, request data via ajax, one page at a time, works with any server-side script, as long as it returns a JSON dataset and easy to style via CSS.
FancyForm is a powerful checkbox replacement script used to provide the ultimate flexibility in changing the appearance and function of HTML form elements. It’s accessible, easy to use and degrades gracefully on all older, non-supporting browsers.