KisMAC is an opensource and free stumbler/scanner application for Mac OS X. It has an advantage over MacStumbler/iStumbler/NetStumbler in that it uses monitor mode and passive scanning.
KisMAC supports several third party PCMCIA cards - Orinoco, PrismII, Cisco Aironet, Atheros and PrismGT. USB Prism2 is supported as well, and USB Ralink support is in development. All of the internal AirPort hardware is supported as well.
Please note: This program is not intended for novices, but for professional users. Take this as a warning
Category:   Software > Monitoring

witools is a small collection of utilities to aid in the exploration of 802.11 wireless networks.
Category:   Software > Monitoring

Category:   Software > Monitoring

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

This project aims to create a GNOME-based panel applet and management tool to manage wireless network cards that support Linux wireless extensions.
Category:   Software > Monitoring