Rhash

Description
RHash (Recursive Hasher) is a console utility for computing and verifying hash sums of files. It supports CRC32, MD4, MD5, SHA1, SHA256, SHA512, Tiger, DC++ TTH, BitTorrent BTIH, ED2K, AICH, GOST R 34.11-94, RIPEMD-160, HAS-160, EDON-R 256/512, Whirlpool and Snefru-128/256 algorithms. Hash sums are used to ensure and verify integrity of large volumes of data for a long-term storing or transferring.
 * Can calculate Magnet links
 * Output in a predefined (SFV, BSD-like) or a user-defined format
 * Ability to process directories recursively
 * Updating existing hash-files (adding hash sums of files missing in a hash-file)>
 * Portability: the program works the same under Linux, *BSD, Solaris or Windows
 * Written in pure C, small in size, open source

Documentation
Use -h for the Help screen.
 * Getting started: http://sourceforge.net/p/rhash/wiki/Home/
 * Man page: http://rhash.anz.ru/manpage.php
 * Hash functions: http://rhash.anz.ru/hashes.php
 * Ubuntu rhash package (bugs page): https://bugs.launchpad.net/ubuntu/+source/rhash
 * Uninstalling rhash from PC: http://pcuninstalltool.com/articles/How-to-Uninstall/Remove-RHash-Completely-Off-Your-PC_24_116231.html