NetSpot - NetSpot is a free app for wireless site surveys, Wi-Fi analysis, and troubleshooting
NetCut - NetCut is a Software that helps you admin your network by purely on ARP protocol.
Vistumbler - Vistumbler is a wireless network scanner for Windows Vista and Windows 7. Features:
CSArp-Netcut - An arpspoofing program that lets users launch spoofed arp requests to disrupt connections in a LAN
Kismet - Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system.
SelfishNet - Block anyone or any device from using your internet