KisMac is a free and open source Wardriving application, like NetStumbler for Windows. I can use it to accurately find open wireless networks while I am on the road. This is known as Wardriving.

KisMac is especially effective with a GPS unit and can even link to Google Earth with the .kismac Google Earth server. With the Google Earth plug-in, I can map out useable wireless signals and even share this information with other KisMac users. This takes Wardriving to a whole new level.

Even if I don’t have a GPS unit, I can view all the other logged KisMac entries in Google Earth.