Autocomplete
Download AutoCompleter (1.1)
by Harald Kirschner | http://digitarald.de/project/autocompleter/
This AutoCompleter script for MooTools provides the functionality for text suggestion and completion. It features different data-sources (local, JSON or XML), a variety of user interactions, custom formatting, multiple selection, animations and much more.
Download FaceBookList (0.2)
by Guillermo Rauch | http://devthought.com/textboxlist-meets-autocompletion/
If you used Facebook on a regularly basis, you’ve probably come across their cool autocomplete method of adding multiple recipients to messages.