NetSpot - NetSpot is a free app for wireless site surveys, Wi-Fi analysis, and troubleshooting

Proxifier - Proxifier extends the advantages of a proxy server to network applications that don't natively support it.

Vistumbler - Vistumbler is a wireless network scanner for Windows Vista and Windows 7. Features:

redsocks - Redsocks is a daemon running on the local system, that will transparently tunnel any TCP connection...

Kismet - Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system.

Proxycap - ProxyCap empowers you to divert your PC’s system associations through intermediary servers.