MultiHasher is described as 'freeware file hash calculator. No Spyware! No Adware! No Viruses! 100% Freeware! Clean & simple'. There are more than 50 alternatives to MultiHasher for a variety of platforms, including Windows, Linux, Mac, BSD and Online / Web-based. The best alternative is HashCheck Shell Extension, which is both free and Open Source. Other great apps like MultiHasher are OpenHashTab (Free, Open Source), GtkHash (Free, Open Source), RapidCRC Unicode (Free, Open Source) and HashMyFiles (Free).
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.