I was using Pitbull 3.x, but opted for Shadowed Unit Frames as I could not figure out how to display everything I wanted with Pitbull 4.x.

Pretty sure Titanpanel is still around. Was using Fubar, which isn't being maintained, so decided to go with Chocolate Bar, and a bunch of plug ins (LDB, or something similar, which basically plug into any number of bar like addons). Chocolate Bar was the closest to Fubar, of the ones I checked out.

I really like Auction Profit Master, Dot Timer, Grid/GridCustomLayouts/Clique, Mapster, Move Anything, and Postal.
But there are a lot of similar addons.