hashdeep!

The HashCheck Shell Extension makes it easy for anyone to calculate and verify checksums and hashes from Windows Explorer. In addition to integrating file checksumming functionality into Windows, HashCheck can also create and verify SFV files (and other forms of checksum files, such as .md5 files). It is fast and efficient, with a very light disk and memory footprint, and it is open-source.

[Hashtab is free for personal use for Windows, NOT for Mac: it can be bought for $1.99 from the Mac App Store.]

HashMyFiles is small utility that allows you to calculate the MD5 and SHA1 hashes of one or more files in your system.

RapidCRC is an open source CRC/MD5/SHA hashing program.

HashTools is an application that calculates hashes for given files. It can calculate CRC32, MD5, SHA1, SHA256, SHA384 and SHA512 hashes, and generate an SFV file for your files if needed. HashTools can also add itself to the Windows Explorer context menu for easy. Just select a file to generate a hash for, click on the button for the type of hash to generate and watch the result magically appear. Once a hash is generated you can copy it to the clipboard, or automatically compare hashes to make sure your file is intact. »

GUI frontend for fsum – a hash calculator supporting a ton of algorithms.

Currently supported hash functions include CRC32, ADLER32, GOST, MD2, MD4, MD5, MD6, SHA1, SHA2, SHA3, RIPEMD, HAVAL, TIGER, WHIRLPOOL and BLAKE2.

MultiHasher is a freeware file hash calculator. No Spyware! No Adware! No Viruses! 100% Freeware! Clean & simple.

CHK is an advanced checksum utility — a simple application designed to help you verify the integrity of your files, find duplicates and much more!Main Features

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.

A fast and easy-to-use calculator that allows to compute message digests, checksums and HMACs for files, as well as for text and hex strings. It offers a choice of 13 of the most popular hash and checksum algorithms for calculations.

checksum is an easy-to-use, no-nonsense BLAKE2, SHA1 & MD5 hashing program for Windows, capable of creating & verifying hashes of files and folders, even whole drives, with just one or two clicks. It is robust, lightning fast, intuitive, and completely customizable. It comes with an installer that adds hashing options to your Explorer menus, or alternatively, can be simply unzipped for portable operation. Or both.

FileVerifier++ is a Windows application for verifying the integrity of files. FileVerifier supports various algorithms by means of dynamically loadable hash libraries. It uses the Windows API and doesn't have any dependencies other than what comes with Windows (WinFVC excluded).

MD5 & SHA Checksum Utility is a tool that allows you to generate CRC32, MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of single or multiple files. You can also verify hashes with the matching file to ensure the file integrity is correct.

This tool will generate hash strings to validate directories and files, in the same vein as hashdeep or fciv. I wrote it after giving up trying to find a decent tool to validate my backups. Although many tools like the two previously mentioned will generate hash files for directory trees, none seem to support maintaining those files as the trees change over time. Hash has many option to keeps the hash files, and the files the hashes were generated from, in sync.