inSSIDer - inSSIDer Essential makes it easy to maintain small business WiFi.
Wireless Network Watcher - scans your wireless network and displays the list of all computers and devices that are currently connected to your network.
NetSpot - NetSpot is a free app for wireless site surveys, Wi-Fi analysis, and troubleshooting
Vistumbler - Vistumbler is a wireless network scanner for Windows Vista and Windows 7. Features:
Aircrack-ng - Aircrack-ng is an 802.
NetStumbler - Official source of information about Netstumbler.