Assess your Wi-Fi network security with these free tools
Aircrack-ng allows you to asses the security of your Wi-Fi network with its suite of tools. The tools allow you to monitor, attack, test and crack. See just how good your Wi-Fi security really is. It works best on Linux, but may also be used on Windows, OS X, OpenBSD, FreeBSD, NetBSD, Solaris and eComStation 2.