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Pro Transparent gzip support
Will access .gz files as gzipped. Can create gzipped files.
Pro Renaming of bad files
-n will rename bad files based on --renameformat.
Pro Recursive operations
cfv offers 2 recursive modes: -r will make separate chksum files for each dir and -rr will create a single file.
Pro Progress bar
Cfv shows a progress bar when working so you know that the process is actually taking place.
Runs on all systems Python supports. It has been verified to work on Linux, FreeBSD, OpenBSD, NetBSD, Solaris, OS X, and Windows.