OpenVAS
Tripwire IP360
Nessus
Comodo HackerProof
Nexpose community
Vulnerability Manager Plus
Nikto
nmap
Veracode
Wireshark
Aircrack-ng
Retina
Paros
WebScarab
WebInspect
Whisker
BurpSuite
Wikto
Watchfire AppScan
N-Stealth
Acunetix Web Vulnerability Scanner