Aircrack-ng - Aircrack-ng is an 802.
Wireless Network Watcher - scans your wireless network and displays the list of all computers and devices that are currently connected to your network.
Kismet - Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system.
Fern Wifi Cracker - Your description
My WIFI Router - Wifi Hotspot creator for Windows
Wireless WEP Key Password Spy - Wireless WEP Key Password Spy will instantly recover all WEP keys and wireless network passwords...