Airscanner:
Mobile Scanner requires a PocketPC 2002 device to run! Airscanner(TM)
Mobile Sniffer monitors all activity within a given segment. Free
for home or personal (non-commercial) use.
Wellenreiter
is a wireless network discovery and auditing tool. Prism2, Lucent,
and Cisco based cards are supported. It is the easiest to use Linux
scanning tool.
"WiFi
Graph" let you spot neighboring Wireless LAN Access Points and their
connectivity. With proprietary scanning technology, Access Point
information is updated every second so you can always rely on it.