NetSpot - NetSpot is a free app for wireless site surveys, Wi-Fi analysis, and troubleshooting
hashcat - The World's Fastest CPU/GPU powered password cracker.
Vistumbler - Vistumbler is a wireless network scanner for Windows Vista and Windows 7. Features:
CrackStation - CrackStation is a web-based service that is used for retrieving passwords by cracking their hashes.
Wifi Analyzer - Wifi Analyzer is a handy tool which helps you to select a better channel for your wireless router.
MDCrack - MDcrack is a an aggressive cracker for MD2 MD4 MD5 HMAC-MD4 HMAC-MD5 NTLM PIX IOS APACHE FREEBSD IPB2 CRC32 CRC32B ADLER32 hashes