One of the most useful development tool I used in the past is Unlocker. this amazing tools is a life saver when you are developing using the file system and use may cause all kind of file handler to be left hanging.
however about a couple of years ago (I think), when I was forced to switch to working on a 64 bit vista machine, I stopped using it since it didn't support that platform.
You can imagine my happiness when found out this week in the Alt.NET tool evening that they now have a version that does support my configuration.
Who said that conventions are a waste of time?