iStumbler is the leading wireless discovery tool for Mac OS X, providing plugins for finding AirPort networks, Bluetooth devices and Bonjour services with your Mac.
With 129,187 free and paid WiFi hotspots in 130 countries, JiWire's WiFi Hotspot Finder makes it easy to locate wireless Internet access around the globe. Use our search tools to find hotspots near a specific address or take a shortcut to our m
AutoAP is a script that continuously scans for open Wi-Fi connections, tests them for validity, and connects to the strongest signal. If the connection is lost, the script scans again and finds the strongest valid signal again, and maintains a continuous connection to the internet in a mobile or portable environment. The script paremeters are highly configurable, including ability to configure secure connections.
KisMAC is free open source software. In our experience it is the best WiFi stumbling software for the Mac, supporting all standard Mac WiFi drivers and using monitor mode and passive scanning.