I’m a bit behind the curve on this one, but I’m now developing with the 30 day trial of ReSharper by JetBrains.  I haven’t even tried all of the features.  There are keyboard chords and hidden features I need to learn.  The obvious ones are code-formatting and general helping you out.  It will close your braces, parens, quotes, etc.  It color codes different types of members. 

As I get more into Agile development methodologies, I’m trying to leverage more tools in order to be more productive.