Tools For Pentest

[Password Crackers]
John The Ripper – http://www.openwall.com/john/
THC Hydra – http://www.thc[.]org/thc-hydra/
Aircrack – http://www.aircrack-ng.org/
Airsnort – http://airsnort.shmoo.com/
RainbowCrack – http://project-rainbowcrack.com/
Cowpatty – http://wirelessdefence.org/Contents/coWPAttyMain.htm

[Packet Sniffers]
Wireshark – http://www.wireshark.org/
Kismet – http://www.kismetwireless.net/
kismac – http://kismac-ng.org/
Tcpdump – http://www.tcpdump.org/
Ettercap – http://ettercap.sourceforge.net/
Dsniff – http://www.monkey.org/~dugsong/dsniff/
Ngrep – http://ngrep.sourceforge.net/
EtherApe – http://etherape.sourceforge.net/
Nmap – http://nmap.org/
SSLstrip – http://www.thoughtcrime.org/software/sslstrip/

[Vulnerability Scanners]
Nessus – http://www.nessus.org/products/nessus
Sara – http://www-arc.com/sara/
QualysGuard – http://www.qualys.com/
SAINT – http://www.saintcorporation.com/index.html

[Web Vulnerability Scanners]
Nikito – http://www.cirt.net/nikto2
Paros Proxy – http://www.parosproxy.org/
Webscarab – https://www.owasp.org/index.php/Category:OWASP_WebScarab_Project
Whisker/libwhisker – http://sourceforge.net/projects/whisker/
Burpsuite – http://portswigger.net/burp/
W3af – http://w3af.sourceforge.net/

[Wireless Tools]
Kismet – http://www.kismetwireless.net/
Kismac – http://kismac-ng.org/
Aircrack – http://www.aircrack-ng.org/
Airsnort – http://airsnort.shmoo.com/
Cowpatty – http://wirelessdefence.org/Contents/coWPAttyMain.htm

[Vulnerability Exploitation Tools]
Metasploit Framework – http://www.metasploit.com/
Canvas – http://www.immunitysec.com/products-canvas.shtml