iStumbler

Wi-Fi networks can be found in many public places nowadays and we can connect and use them for free, with any portable device. If you want to know what networks can be found around you and how fast they are, iStumbler can help you. This lightweight utility can discover all Wi-Fi networks around a Mac, without asking for any user intervention. The application can also discover Bluetooth devices, Bonjour services, as well as location information.

The application scans for the aforementioned services or devices automatically, according to a user-defined time frame. Discovered Wi-Fi hotspots, Bluetooth devices and so on are listed on a compact user interface, in separate sections. In addition, iStumbler provides you with a wide range of details for each listed element. For example, it can show a Wi-Fi network's signal strength, encryption status, used protocol and much more.

You can interact with the listed items in different ways. Double clicking a Wi-Fi network will display a connection monitor. When viewing connected or discoverable Bluetooth devices, you may click different options, in the upper right corner of the interface, to set up new devices, manually pair with them and send files.

Other useful options can be found in the application's Preferences panel. You can set it to remember discovered networks for a certain amount of time, to prevent it from using too much memory, set it to scan for networks or devices more often, to automatically select the best network and much more.