"Wiffiti publishes real time messages to screens in thousands of locations from jumbotrons to jukeboxes, bars to bowling alleys and cafes to colleges.
You can interact with Wiffiti from your mobile phone or the web."
"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."