TamoGraph Site Survey - Wi-Fi site coverage survey and modelling application
iBwave Wi-Fi - iBwave Wi-Fi software suite brings smart networking solutions to enterprise, education, hospitality, transportation, retail, office, healthcare, public venues, and residential wireless networks.
Waircut - Free network audit app
Homedale - With Homedale you can search for Wi-Fi / WLAN Access Points and monitor their signal strength.
Vistumbler - Vistumbler is a wireless network scanner for Windows Vista and Windows 7. Features:
Xirrus wifi designer - Designing a Wi-Fi network that meets user demands in your unique environment is easy. Use this intuitive, predictive heat-map tool to develop your predictive design to implement a robust Wi-Fi network.