wireless sniffer and monitor - core

 Kismet is an 802.11 layer-2 wireless network detector, sniffer, and
 intrusion detection system. It will work with any wireless card that
 supports raw monitoring (rfmon) mode, and can sniff 802.11a/b/g/n
 traffic.
 .
 It can use other programs to play audio alarms for network events,
 read out network summaries, or provide GPS coordinates.
 .
 This is the main package containing the core, client, and server.