kwavecontrol is a kde-monitoring tool for wireless devices showing diverse information like signal quality, bitrate, e.g.
Category:   Software > Monitoring/Scanning

WiSentry creates a secure buffer-zone between your WLAN and the internal wired network. With WiSentry, IT organizations can authorize 802.11 wireless devices for trusted access and lock-out all other devices. WLAN hackers and network intruders are identified and barred access from the wired LAN. Unsecured wireless access points are detected immediately, allowing for removal of the access point before network security is compromised
Category:   Software > Monitoring/Scanning

Hotspotter passively monitors the network for probe request frames to identify the preferred networks of Windows XP clients, and will compare it to a supplied list of common hotspot network names. If the probed network name matches a common hotspot name, Hotspotter will act as an access point to allow the client to authenticate and associate. Once associated, Hotspotter can be configured to run a command, possibly a script to kick off a DHCP daemon and other scanning against the new victim.
Category:   Software > Monitoring/Scanning

wavemon is a ncurses-based monitoring application for wireless network devices. It currently works under Linux with devices that are supported by the wireless extensions by Jean Tourrilhes (included in Kernel 2.4 and higher), e.g. the Lucent Orinoco cards.
Category:   Software > Monitoring/Scanning

WaveWatcher is a network management program for the monitoring and logging of wireless networks.
Category:   Software > Monitoring/Scanning