Wireless Analysis (5)
Solution that let you define the state of a system via a baseline. Then you can monitor and alert for changes with an option to automatically enforce the correct configuration to ensure the right services are up and running, on the right platforms. This can ensure that correct security configurations remain in place and also assist in intrusion detection.
Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system. Kismet will work with any wireless card which supports raw monitoring (rfmon) mode, and (with appropriate hardware) can sniff 802.11b, 802.11a, 802.11g, and 802.11n traffic. Kismet also supports plugins which allow sniffing other media such as DECT. 
inSSIDer is now a commercial only tool
It's a simple tool (written in Python) that does information gathering using WPS information elements. WPS or Wi-Fi Protected Setup is a standard created by the Wi-Fi Alliance that allows the users to setup the security of a Wireless AP in a simple way.
Wireless APs supporting WPS discloses enough information to fully fingerprint it using only 1 probe request frame.
The following information can be obtained using this method:
•Device Name
•Model Number and Name
•Manufacturer
•Serial Number of the device