Kismet is an 802.11 layer 2 wireless network detector, sniffer, and intrusion detection system. It will work with any wireless card which supports raw monitoring (rfmon) mode, and can sniff 802.11b, 802.11a, 802.11g, and 802.11n traffic (device drivers permitting). It identifies networks by passively collecting packets and detecting standard named networks, detecting (and given time, decloaking) hidden networks, and inferring the presence of non-beaconing networks via data traffic.
Wifimap is a Web-based application that graphically documents the organisation and growth of a wireless network community. The map is composed of numerous square cells that are recombined to display the required area. Users can start with just a few cells to cover their area, and can access different areas of the network by scrolling through the cells. New cells can be easily added using a built in editor. Cells can be added at different zoom levels allowing users to zoom in and out of the map. The design makes it very fast, and it can be run on low powered servers. Wireless nodes can be added or edited with a few mouse clicks. Links between the nodes are automatically drawn based on the data entered for each node, and colours are used to represent different wireless protocols.