Utility to generate and verify checksums/hashes
sha3sum - A demonstration of the Keccak permutation.
A family of small-state CSPRNGs and Stream Ciphers
A family of FLEA-inspired CSPRNGs and Stream Ciphers
ISC lets you encrypt & decrypt text and files of any type up to 4GB
A program to generate random reciprocal bigram tables
inKey - small & strong encryption utility (> 800 000 bit).
Decrypt messages encrypted with a substitution cipher