Read about and download these simple jQuery plugins that were created to save development time:
Uses an input box to filter an unordered list in real-time.
Locks a header to the top of the page only when user is scrolling within it's parent container.
Expands the clickable area to an entire table row if that row contains a link.
Utility that warns a user of impending session timeout and provides an option to continue the session.
A lighter version of jQuery UI's tabs. For when you just need simple tab functionality and don't need to include the entire UI library.