No 3D Units there, thats an addon called Mini-Me, it's just a little you thats allways looking at you, so you see what you look like when u put on gear, but i keep it there all the time, cuz i want to see how handsome my hunter looks
As fort the square minimap, thats Mappy, only problem is, you can't move most of the addon icons, but it lets you see more of the terrain to come, but it still has the same range a normal, round map has (when a party member goes farther than on a round map, he dissapears and an arrow apears, just like the round one)

...My barts are CT2 mods, it makes it easier to put all my spells and stuff.
I got a nice little clock that is set to my timezone, and that big window you see there, thats my bank, i can't touch the stuff, but i don't have to go check my bank to see what i got in it, i just click a macro.
The little icon with the scroll on it is Recipe Radar, and it shows vendors on the map that sell recipes, and it shows how many recipes can be learned from those vendors.

All my spells are nicely organised, exept the ones down right in the action bar, cuz i've been doing some modyfing of my interface and i had to pu em' somewhere

...Thats that for the visible addons on the screenshot, i got WHDB wich shows in the quest log and has adds coments from wowhead.com into my quest log, works great when quest helper can't figure out the quest
I got cartographer and a few more little addons.

Oh, and for the CT2 mods, when i move the mouse over a game object or target, i see the little info bar ( thats shown in the down right corner ussualy) right next to the mouse.

...Thats that, and if anyone needs more info, just ask.