If you find an addon that you think others might find cool, post it.
I'll add links to mine later.
Bind a key to Geist and when you hold down that key, 24 buttons come up right under your mouse. I put my food, bandages, flasks, elixers, prof., Stuff like that- Saves a lot of bar space and still keeps them very handy.
Button Bin. Like Fubar, but you can move it, hide it, even set it up for a mouse over.
CBH Viewpoint - Letterbox addon - gives you a lot wider view- enables you to see a lot more. I use a wide screen monitor anyway, so this gives me a really really wide angle - I love it. Plus you can throw a ton of addons in the black space and have a lot more real estate for addons.
SexyMap: Mini map addon -There are two featrues of this addon I love- You can Keybind a Hud map - so you have a big mini map right in the middle of your screen and it fades out all buttons that are on your mini map - they appear when you mouse over them.