cacertdir_rehash (8) - simple script to create or update hash links to certif...
Config::Extensions (3pm) - hash lookup of which core extensions were built.
Digest::HMAC (3pm)   - Keyed-Hashing for Message Authentication
Digest::HMAC_MD5 (3pm) - Keyed-Hashing for Message Authentication
Digest::HMAC_SHA1 (3pm) - Keyed-Hashing for Message Authentication
doveadm-pw (1)       - Dovecots password hash generator
git-hash-object (1)  - Compute object ID and optionally creates a blob from a...
hash (1)             - bash built-in commands, see bash(1)
hash (1p)            - remember or report utility locations
Hash::Util (3pm)     - A selection of general-utility hash subroutines
Hash::Util::FieldHash (3pm) - Support for Inside-Out Classes
hcreate (3)          - hash table management
hcreate (3p)         - manage hash search table
hcreate_r (3)        - hash table management
hdestroy (3)         - hash table management
hdestroy (3p)        - manage hash search table
hdestroy_r (3)       - hash table management
hsearch (3)          - hash table management
hsearch (3p)         - manage hash search table
hsearch_r (3)        - hash table management
idmap_hash (8)       - Samba's idmap_hash Backend for Winbind
ldns-nsec3-hash (1)  - print out the NSEC3 hash for a domain name
Mail::SpamAssassin::Plugin::Hashcash (3pm) - perform hashcash verification tests
nsec3hash (8)        - generate NSEC3 hash
sslpasswd (1ssl)     - compute password hashes
Tie::Hash (3pm)      - base class definitions for tied hashes
Tie::Hash::NamedCapture (3pm) - Named regexp capture buffers
Tie::Memoize (3pm)   - add data to hash when needed
Tie::RefHash (3pm)   - use references as hash keys
Tie::SubstrHash (3pm) - Fixed-table-size, fixed-key-length hashing