inSSIDer is an award-winning free Wi-Fi network scanner for Windows Vista and Windows XP. Because NetStumbler doesn't work well with Vista and 64-bit XP, we built an open-source Wi-Fi network scanner designed for the current generation of Windows operating systems. inSSIDer was discussed by Lifehacker and Tekzilla!
InSSIDer is licensed under the Apache License, Version 2.0. The source code is freely available from our public Subversion repository at http://www.metageek.net/svn/trunk. If you would like to contribute changes to InSSIDer please contact support@metageek.net.