iStumbler provides information about nearby Wi-Fi Networks, Bluetooth Devices, Bonjour Services and Current Location.

• Lists visible wireless networks with complete information.
• Inspector shows detailed information including a high-resolution graph, notes, extended properties and samples.
• Always displays the connected network, even if it's private.
• Graphically indicates network type and encryption status.
• Signal and noise graphed over time for the selected network.
• Connection monitor for connected network.

• Lists discoverable, recent, connected or favorite Bluetooth devices.
• Inspector shows detailed information including notes, properties and samples.
• Toolbar 'Set-up', 'Pair' and 'Browse' buttons to work with bluetooth devices.

• Forward and reverse mDNS browsing.
• Inspector shows detailed information including network addresses and service keys.
• [Tiger] support for wide-area Bonjour browsing.