I've just pushed out my new Catalyst app. It was built over New Years weekend with some additional hacking since. I finally got off my ass to finish up some last little issues with it and rolled it out the door. It has some minor problems, but is a good start. The UI does need some significant work, especially in the contact management. I'm going to make some progress on some backend features before making the UI any prettier than it needs to be.
Behold: MailRoller
(Do you hear the angels singing? Yeah, me either.)