MD5 Message Digest Algorithm
- Algorithm specification and its implementation in 'C'.
- http://tools.ietf.org/html/rfc1321

The RadioGatún Hash Function Family
- Links and resource on the cryptographic hash function family called RadioGatún.
- http://radiogatun.noekeon.org

Whirlpool Hashing Function
- A 512-bit hashing function, submitted to NESSIE and selected as finalist. Now also proposed for inclusion in the ISO 10118-3 standard (revision).
- http://paginas.terra.com.br/informatica/paulobarreto/WhirlpoolPage.html

Web Based Cryptographic Hash Calculator
- Online calculator that performs MD5, SHA1, SHA-256, SHA-384, and SHA-512 hash functions.
- http://www.johnmaguire.us/tools/hashcalc/

Masher Applet - MD5 implemented in Java
- Nice online application to produce a MD5 message digest. Supports copy-and-paste function. Includes Java source code.
- http://www3.telus.net/Voiculescu/masher/index.html

Tiger: A Fast New Hash Function
- Optimized for 64-bit processors and produces 128, 160, or 192-bit hashes.
- http://www.cs.technion.ac.il/~biham/Reports/Tiger/

Message Authentication Algorithm
- Algorithm specification and its implementation in 'C' and in BASIC.
- http://www.cix.co.uk/~klockstone/maa.htm

Secure Hash Algorithm Directory
- MD5, SHA-1 and HMAC information, resources and API's.
- http://www.secure-hash-algorithm-md5-sha-1.co.uk/

RIPEMD-160 hash function
- A 160-bit cryptographic hash function designed as a secure replacement MD4, MD5, and RIPEMD.
- http://www.esat.kuleuven.ac.be/~bosselae/ripemd160.html