Lepton\'s Crack

Lepton\'s Crack is a generic password cracker, easily customizable with a simple plug-in system. It can perform a dictionary-based (wordlist) attack, as well as a brute-force (incremental) password scan, including enumeration of a regular expression (useful if you know something about the password) Currently the formats supported are: standard MD4 hash, standard MD5 hash, NT MD4/Unicode, Lotus Domino HTTP password (R4) and SHA-1. Download link is in the directory listing linked at the bottom of the page.