What am I going on about? Today I'm talking about Rawr. Rawr is a program that was originally developed to help Druids figure out gear upgrades for Bear and Cat forms. I know it's been around for at least two years, but know exactly how long. There's been many changes (it's now in Beta 15), and it's come a long way from just supporting Druids. It now supports the following classes/roles:
Likewise, for tanking, you can see how each item stacks up in different areas. For tanks, it's not just how much stamina you have. So, Rawr breaks it down into Mitigation, Survival, and Threat. All of which are important to tanks.
You can also enter all the gear you currently have, and it will optimize it for you. Results may vary. Most of the time it seems to give good suggestions. There's some gear choices that are debatable, but aren't they all?
Now this program is essentially for level 70 toons. You can change your specs and the gear will adjust accordingly as well. If you're looking for gear lists of any of the above classes, go check it out. It's a great program.