password recovery tools

John the Ripper (JtR)
    Our current default tool to audit most of the leaked hashes
    http://www.openwall.com/john/
oclHashcat-plus
    De facto standard GPU-based password cracker
    http://hashcat.net/oclhashcat-plus/
hashcat-utils
    Useful set of utilities to manipulate wordlist
    http://hashcat.net/wiki/hashcat_utils
THC-Hydra
    Fast network logon cracker
    http://www.thc.org/thc-hydra/
Cain & Abel
    Password recovery tool for Microsoft Operating Systems
    http://www.oxid.it/cain.html
Aircrack-ng
    802.11 WEP and WPA-PSK keys cracking program
    http://www.aircrack-ng.org
KisMAC
    Wireless stumbling and security tool for Mac OS X
    http://kismac-ng.org