Very Fast Network Logon Cracker: THC-Hydra
From the webpage:
Number one of the biggest security holes are passwords, as every password security study shows. Hydra is a parallized login cracker which supports numerous protocols to attack. New modules are easy to add, beside that, it is flexible and very fast. This fast, and many will say fastest network logon cracker supports many different services. Deemed ‘The best parallelized login hacker’: for Samba, FTP, POP3, IMAP, Telnet, HTTP Auth, LDAP, NNTP, MySQL, VNC, ICQ, Socks5, PCNFS, Cisco and more. Includes SSL support and is part of Nessus.
If you don’t know CyberPunk, they have great graphics:
If you have found the recent 1.4 billion password dump, THC-Hydra is in your near future.