I recently came across a new browser called IE Tester. I saw someone using it in a video to check how a site looked in different versions of IE.

I downloaded IE Tester, but haven't installed it yet. It's still in an early alpha version (0.2.2), but it looks like a very good way to test pages in different versions of IE.

Thanks for some useful resources
I normally use Browsershots.com for my web design