a free cross platform checksum utility, supports 58+ hash algorithms
...Please visit the GitHub site for current development.
Jacksum 1.7.0 is a platform independent checksum utility (written entirely in Java) for computing and verifying (integrity check) checksums, CRC and hashes (fingerprints). It supports 58 popular hash algorithms and a lot of unique features.
iSFV is an easy to use integrity checker for SFV files. Use it to test for corrupt files in packages that come with SFV files. You can also use it to edit or create your own SFV files.