To fight the threats to our Wireless Network, there are few software tools we should keep handy. Following Wireless security tools are provided as Educative and for Administrative purpose to check the network vulnerability. Normal users please handle with care.

http://sourceforge.net/projects/wifiscanner
Black Alchemy's Fake AP generates thousands of counterfeit 802.11b access points. Hide in plain sight amongst Fake AP's cacophony of beacon frames. As part of a honeypot or as an instrument of your site security plan, Fake AP confuses Wardrivers, NetStumblers, Script Kiddies, and other undesirables.
http://www.blackalchemy.to/project/fakeap/
AirSnort is a wireless LAN (WLAN) tool which cracks encryption keys on 802.11b WEP networks. AirSnort operates by passively monitoring transmissions, computing the encryption key when enough packets have been gathered.
http://sourceforge.net/project/showfiles.php?group_id=33358
Kismet, default wireless network administration tool, works with 802.11a/b/g that supports raw packets monitoring mode, can be used as Intrusion Detection System [IDS].
http://www.kismetwireless.net/index.shtml
MiniStumbler, from NetStumbler used on devices running on devices running PocketPC 3 and PocketPC 2002 OS.
http://www.netstumbler.com/downloads/
Trifinite, download collection of Bluetooth, J2ME, RFID security tools and wireless security whitepapers.
http://trifinite.org/trifinite_downloads.html