The df command of the cmd.net collection lists all available drives and their total space, used and free space in GB.
Drive Total Used Free Used% FS Label C:\ 97 57 39 59% NTFS D:\ 833 443 389 53% NTFS E:\ 0 0 0 %
(e: being a removable disk drive in this case)
The guid command writes a new GUID to stdout
The enc command converts an encoded stdin to a different encoding on stdout using the -in [encoding] and -out [encoding] command-line switches.
enc -in [CP number or encoding name] -out [CP number or encoding name] < [input filename] > [output filename] some-batch-command | enc -out [CP number or encoding name] > [output filename]
The current version of cmd.net is available for download here.