Looking for some AJAX scripts? MiniAjax is a gallery of “nice looking simple downloadable dhtml and ajax code.”
The one-page site shows 62 (to date) entries for various useful scripts. There are star-rating systems, modal dialogs, heatmap generators, poll scripts, tabbed interfaces, and more. Thumbnails make the site easy to browse.
If you’re looking for a specific type of script, or if you just want to see what’s out there, be sure to take a look at MiniAjax.