Murmur is a C++ fork/rewrite of the smhasher project to bring Murmurhash v.3 to the Linux shell and to the PHP scripting language.
CityHash is a new family of hash functions developed at Google that are thorough and fast. They are not suitable for crypto but are very good on little-endian 64-bit machines, including many current Intel and AMD chips.
An implementation of the Kerberos protocol.
The Horde calendar application.