Twitterfall is a Twitter client specialising in real-time tweet searches. New tweets fall into the page.
Twitterfall has a huge feature list and there are many actions that can't be done on other clients.
For popular trends, Twitter is queried from the Twitterfall server, and results are streamed directly to you. This means that Twitterfall is nicer for commonly used terms than other clients.
Twitterfall was written by x5315 and Jalada. The name was coined by Chris Northwood.
Twitterfall is a collection of Erlang, JQuery, Google Maps and Language APIs, Comet Push Technology and Twitter.