Navizon features P2P GPS WiFi Wireless Positioning
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Navizon network is based on a collaborative database. Members with a GPS device can use Navizon to map the Wi-Fi and cellular landscape in their neighborhoods. Once they synchronize their data, it is made available to all the other users of the network. This way, users who don’t have a GPS device can benefit from a positioning system. And it’s free for personal use.
Navizon already offers for free the same type of cell-tower triangulation technology upon which Google’s “My Location” features relies. But, if you need even more accuracy (close to that of GPS positioning) Navizon offers a premium upgrade that leverages WiFi hotspot-positioning to help you get an even more accurate location-information.
You can download this software for free directly from the official site :
www.navizon.com/Download.asp