By giving an autocompleted field focus or entering something into it, the plugin starts searching for matching entries and displays a list of values to choose from. By entering more characters, the user can filter down the list to better matches.
Ajax Autocomplete allows you to easily create autocomplete/autosuggest boxes for text input fields with every query result being cached and pulled from local cache for the same repeating query. If there are no results for a particular query it stops sending requests to the server for other queries with the same root.
Ajax Autocomplete »
FaceBook Like is a powerful jQuery plugin that transform an input field into a real time autocompletion search engine, designed, as the name suggests, similiar to the one on Facebook.
FaceBook LikePlugin »