NetStumbler, the number 1 essential "find a WLAN" tool.
MiniStumbler - NetStumbler for your PocketPC.
Download NetStumbler and MiniStumbler here
WSA, the Wireless Security Auditor, from IBM.
CENiffer, another PocketPC sniffer.
Airscanner, a free, full-featured 802.11b ethernet sniffer for the Pocket PC
