Windows 7/Windows Server 2008: If you're a fan of the virtual hard-drive system available in newer versions of Windows but you're not a fan digging in the control panel for clunky mounting and unmounting, check out VHD Attach.
The default method for mounting and unmounting a VHD is either to drill down through several layers of windows or bust out a command at the command prompt. VHD Attach simply adds a right-click "Attach" and "Detach" entry when you pull up the context menu on a VHD file. You can also use application itself to mount a VHD — as seen in the screenshot above — where you can see additional information about the drive once you mount it.
VHD Attach is freeware and works only on Windows 7 and Windows 2008 R2. Have a handy tool for virtual hard disk, machines, or other virtualisation tricks? Let's hear about it in the comments.