ReSharper and CodeRush
I am really fond of ReSharper! Jeff Keys is also under its spell and I can't express my feelings better than what he writes about it here. The features, I love the most, are Refactoring, Syntax and Error Highlighting and Code Navigation. ReSharper offer a plenty of others goodies, but I just haven't utilized them in my daily-work routine... Btw, I new version with more refactorings is cooking and you may use its Early Access Program.
Using ReSharper is a real pleasure, that's for sure. But yesterday I read what Sam Gentile had said about CodeRush and why he made the switch. So, I examined carefully CodeRush' s comparative advantages. I also looked at some super cool features like Flow Break Evaluation. I am not sure if this is enough to consider switching, but I will probably evaluate it for a few weeks and see how will I feel about it. It's funny how a simple thing such as distinctive visualization of Regions (which are excessively used in the code base my team is working on) can convert me :)