Vistumbler - Vistumbler is a wireless network scanner for Windows Vista and Windows 7. Features:
Aircrack-ng - Aircrack-ng is an 802.
inSSIDer - inSSIDer Essential makes it easy to maintain small business WiFi.
Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
NetSpot - NetSpot is a free app for wireless site surveys, Wi-Fi analysis, and troubleshooting
Homedale - With Homedale you can search for Wi-Fi / WLAN Access Points and monitor their signal strength.