"Pitbull" offers the same functionality as "agUF"... and much, much more.
It is highly customizable. Some like that, some don't. It usually uses a little more memory than "agUF", but all its modules are LoD, so you decide what you want to use, and what not. To get an idea, you probabely wanna take a look at those two threads:
http://www.wowace.com/forums/index.php?topic=6823.0
http://www.wowace.com/forums/index.php?topic=6878.0