Can't find twitter desktop app

[swampie]

I remember seeing it a while back, whenever someone tweets something it popped up in the bottom right that there was a tweet and who it was by, does anyone know what it is?

[Jack_Thompson]

Tweetdeck?

[raalph]

[url]http://desktop.google.com.br/plugins/i/twitter.html?start=40[/url]

This?

[Mattyyyy]

Seesmic?