Forgive me if this has been done before, but what are your favorite free/cheap applications to help with your testing efforts? I suppose this should exclude all the major automation tools since most everyone knows about them anyway, but if there are any little-known ones you think are great, please mention them. I'm just looking to broaden my toolset a bit.
Mine would include:
XML Notepad - edit XML files
WinDiff - compare files/directories
VNC - remote access
VMWare - Virtual computers (ok, not cheap, but essential for me)