jHashCalc is a GPL implementation of the popular hashing utility "HashCalc" from SlavaSoft. jHashCalc is written in Java language, and uses the GNU Crypto API to perform the algorithms' computing.
MacHash is intended to be a HashCalc clone for Mac OS X. Sporting a neat Aqua interface, it allows you to calculate a variety of popular hash values like MD5 or CRC32 from diffent input sources such as a line of text or a file on disk.