Gmail + Growl: Make Gmail Notifier roar:

"I didn't create that headline, the makers of the software did. Gmail+Growl is essentially a Growl plugin that works with Gmail Notifier to create Gmail alerts via Growl. Make sense? For those of you unhip to the Growl scene, it's been mentioned on TUAW a few times before, and is quite popular around here. "

(Via The Unofficial Apple Weblog (TUAW).)