
click to enlarge
Titan Panel is one of the more subtle and interesting add-ons in WoW, because it can itself have add-ons plugged into it. The add-on gives you a small horizontal toolbar across the top or bottom of your interface. On these bars are various pieces of information, such as your location, how much gold you have, your ping and frame-rate, and the current looting rules for your group. The size, font, and transparency of the bar is configurable, as is what information it shows.
What is so interesting about Titan Panel is the add-ons for it that give it greater functionality and keep track of other statistics, such as damage-per-second, warrior's stances, and buff durations. Because of this, almost any piece of information you can think of has an add-on for Titan Panel available, which makes this the add-on that keeps on adding on. You can even set both the top and bottom bars up for added room and fill both of them with useful functions and statistics.
Overall, Titan Panel is the kind of add-on you put in and then take for granted, only realizing how useful it was when you don't have it enabled. No installation of WoW should be without it.