Information Assurance: Vulnerability Scanners

Network intrusion detector, very lightweight.

For the newest version visit:
http://www.xfocus.net/tools/
Note the page is in Chinese

Windows based vulnerability scanner, with NASL support, service and remote OS type/version detection, weak user/password pairs identification and other functionality.

Security Auditor's Research Assistant, multiplatform vulnerability assessment. Latest version released June 2009. Development has ceased.

Microsoft Baseline Security Analyzer Microsoft, detects vulnerabilities according to Microsoft's security recommendations and suggest possible solutions. Works with Windows Update Agent and Microsoft Update, MBSA collaborates with Microsoft management products including Microsoft Update (MU), Windows Server Update Services (WSUS), Systems Management Server (SMS) and Microsoft Operations Manager (MOM).