Does Windows 7 have any built-in tools (GUI/command-line) for creating and mounting disk images (similar to Disk Utility/hdiutil on Mac OS X)? I did a quick search in the Windows Help for "disk image", which gave me info about how to create an image of the entire system and how to burn images to optical discs; but the tools involved seem to be limited to those two particular usage scenarios. Is there any command-line only support, or do I need to turn to third party tools?
it depends on the sort of image.
Windows 7 has VHD support built in - you can use diskpart to create a disk image
creating a VHD
diskpart create vdisk
file=c:\virtual\win7.vhd type=fixed maximum=16000
This creates a 16 gb vhd called win7.vhd
You can mount it
diskpart select vdisk
file=d:\virtual\win7.vhd attach vdisk
You can create standard IMG files by other means and mount it with filedisk
if you want to mount other sorts of files, it depends - I believe there's vmware diskmount (may not work on newer versions of windows)
I have no idea what will mount a VDI
Virtual Clone Drive is another freeware app that's quite useful for mounting images of different formats. You can create multiple virtual drives too.