hash

Calculate file hash: CRC32, GOST, MD2, MD4, MD5, SHA1, and SHA2.

Get the file hash and compare it with another.

Calculates the ezmlm-hash of an email address for use with mysql.

Returns a random key from your hash, but won't repeat until it's done every one.

I needed a Ruby Hash class that could extract a random key from the keys .

Freeware cryptographic hash and crc value calculator for md5, crc32, sha-1, etc.

Shell extension allowing you to determine the hash sum of any file.

Compute and save hashes and checksums for multiple files: MD5, SHA1, SHA2, CRC.

Calculate file checksum, find duplicates, verify integrity.

Probably nothing new in this but here is one way of converting an Array .