NetworkManager - NetworkManager is a set of co-operative tools that make networking simple and straightforward.
inSSIDer - inSSIDer Essential makes it easy to maintain small business WiFi.
wicd - Wicd is an open source wired and wireless network manager for Linux.
NetSpot - NetSpot is a free app for wireless site surveys, Wi-Fi analysis, and troubleshooting
iw - iw is a new nl80211 based CLI configuration utility for wireless devices.
Vistumbler - Vistumbler is a wireless network scanner for Windows Vista and Windows 7. Features: