Rawr

Rawr is a program for comparing and exploring gear in World of Warcraft. Rawr has been designed from the start to be fun to use, and helpful in finding better combinations of gear, and what gear to obtain.
http://www.codeplex.com/Rawr

I am sure we all get in situation when we don't know what gear to change with what, we get alot of combination in order to get max dps out of avaible gear. Well Rawr changed this questions, and makes them easy.
It's a must program tbh, makes life alot easyer

Just downloaded it and had a quick play with it and it seems quite good.