http://www.ekahau.com/products/heatmapper/overview.html
I’ve been looking for a free wireless site survey tool for years. This one doesn’t even require a special wifi adapter.
“HeatMapper brings something to the Wi-Fi utility table that’s been missing for a long time. As free utilities go, HeatMapper is a gem.”
Ekahau HeatMapper is a free software tool for quick and easy coverage mapping of Wi-Fi (802.11) networks. It’s the only free, easy-to-use tool that shows, on a map, the wireless network coverage in your home or small office. HeatMapper also locates all access points.
HeatMapper also provides a real-time view to all access points and their configurations.
HeatMapper uses your built-in wireless network adapter, therefore, all you need is a Windows-based laptop with wireless. And it takes just one minute to install.
bij mijn lenovo laptops zit een util genaamd “access connections” je kunt er mee switchen tussen allerlei connectie profiles, als je een wifi profile maakt zie je een kaartje met rondjes aan de hand van de afstand. het is gratis maar werkt dus wel alleen op een lenovo machine (denk ik) http://www.pc.ibm.com/presentations/us/thinkvantage/56/index.html?shortcut=accesscon&