Looking for General Client Vulnerabilities-

After you find out which wireless systems are alive on your network, you can
take your testing a step further and see which vulnerabilities really stand out.
There are various freeware, open source, and commercial tools to help you
along with your efforts including:
LanSpy (www.lantricks.com): LanSpy is a Windows-based freeware
tool for enumerating Windows systems.
Amap (http://thc.org/thc-amap): Amap is an open source Linuxand
Windows-based application mapping tool.
Nessus (www.nessus.org): This is an open source network and OS vulnerability-
assessment tool that runs on Linux and Windows.
GFI LANguard Network Security Scanner (www.gfi.com/lannetscan):
This is a Windows-based commercial tool for performing network and
OS vulnerability assessments.
QualysGuard (www.qualys.com): QualysGuard is an application service,
provider-based commercial tool for performing network and OS
vulnerability assessments.