Wifiner – WiFi Analyzer v.1.0 Wifiner is an indispensable solution for Wi-Fi site surveys, analysis and troubleshooting of your current Wi-Fi network.Compare, filter and analyze WiFi networks, using the obtained data to resolve possible issues with WiFi.

NetSpot - WiFi Analyzer v.1.1.21 NetSpot for Android is the best way to discover WiFi networks around you, see the network name, band, channel, signal level, security, etc.SterJo Wireless Network Scanner v.1.0 SterJo Wireless Network Scanner will find all devices connected to your wireless network in a few seconds.SterJo Wireless Network Scanner is a small tool that scans your network in a few seconds and displays a list of all connected computers or devices.Specifically written for Ubuntu Hardy and I would imagine can work with most network. Written in perl as a wrapper for iwtools to manage and connect to access points. Widrive v.0.10 A terminal based wifi scanner for linux.It can be used for wireless site surveys, wireless discovery. This will detect access points and clients in ad-hoc mode if the SSID is being broadcasted.

WiFi Scanner for Mac OS v.1.1 A free 802.11 wireless scanner and connection manager for Mac OS X 10.6 Snow Leopard or later.

Free softperfect wifi guard