Robocopy is one of those utilities I use a lot for copying files across a network. It does what Xcopy et al doesn't - it handles network outages, and can be restarted. This makes it ideal for all sorts of copy uses. Robocopy is found inside the Windows Server 2003 Resource Kit (a tool kit I install on all my systems). As Rodney Burke notes in his blog, Robocopy is a command line tool - but now there is a GUI. You can download Robocopy GUI here!
The download is an executable file that unzips to an MSI that you can then run. Yet another way of deploying software, but it works I suppose. The GUI is a little basic - and it sure helps if you know the switches for the Robocopy console command.
Thanks to Rodney Burke for his tip about RoboCopy's GUI.