LaunchBar got a nice and welcomed update just before the weekend, adding quite a bit of support for Mountain Lion. I wish the iMessage integration were a bit more magical and akin to the way the Contacts app works when sending an iMessage from within there. Instead acting on a phone number to send an iMessage launches the Messages app.
P.S. Ben and I did a LaunchBar tips and tricks episode on the The B&B Podcast a few shows back.