NetSpot Alternatives

inSSIDer Essential makes it easy to maintain small business WiFi.

Wifi Analyzer is a handy tool which helps you to select a better channel for your wireless router.

Vistumbler is a wireless network scanner for Windows Vista and Windows 7. Features:

Official source of information about Netstumbler.

WiFi Explorer is a tool to scan, find, and troubleshoot wireless networks.

Scans wireless networks in your area and displays extensive information, including: SSID, MAC Address, PHY Type (802.11g or 802.11n), RSSI, Signal Quality, Frequency, Channel Number, and more...

Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system.

With Homedale you can search for Wi-Fi / WLAN Access Points and monitor their signal strength.

A 802.11 wireless scanner and connection manager for Mac OS X.

Acrylic WiFi is a free to use WiFi scanning and channel scanning tool for the Windows operating devices only.

NetSurveyor is an all one network diagnosing and troubleshooting tool for the Windows operating systems.

Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.

The Free Wi-Fi Coverage Mapping Site Survey Tool