When comparing IgorWare Hasher vs cfv, the Slant community recommends cfv for most people. In the question“What are the best file integrity checkers?” cfv is ranked 16th while IgorWare Hasher is ranked 21st. The most important reason people chose cfv is:
Will access .gz files as gzipped. Can create gzipped files.
Specs
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Pros
Pro Supports SHA-1, MD5, and CRC32 checksum formats
Choose one or more hash types to calculate simultaneously.
Pro Can compare hashes directly against externally verified checksums
Just copy the checksum into a verification field for the particular checksum format.
Pro Can hash plain text (using UTF-8 encoding) pasted into a text field
Pro Portable
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 Progress bar
Cfv shows a progress bar when working so you know that the process is actually taking place.
Pro Cross-platform
Runs on all systems Python supports. It has been verified to work on Linux, FreeBSD, OpenBSD, NetBSD, Solaris, OS X, and Windows.
Pro Recursive operations
cfv offers 2 recursive modes: -r will make separate chksum files for each dir and -rr will create a single file.