My UI is really sloppy, but here are the various pieces of it:
Here are the unit frames. You can customize them more than I did, and the little portraits move around, they don't just sit there frozen. The space below my target (the Crimson Monk) is actually a cast bar. When he casts a spell, you see the cast bar there, which is pretty handy. Other mods can do this as well, of course, but it's a neat addition to the unit frame.
Here is the chat mod. It was actually made from Muaadeb, from EQ, if any of you remember him. It is fully customizable, you can put tells in a separate tabbed window, guild chat in its own tabbed window, and more. It gets rid of those annoying scroll arrows and lets you scroll the chat up and down with your mouse wheel.
Here are the bars I use. I don't use BarTender, but everyone says it is better than what I have (I use Trinity). I am a clicker, but you can still hotkey every button.
Here is the FuBar, which is just like Titan Panel. However, it uses less resources, is updated daily, and has many more options that Titan Panel doesn't have.