Surge for Mac - Advanced Web Debugging Proxy for Mac & iOS
NetSpot - NetSpot is a free app for wireless site surveys, Wi-Fi analysis, and troubleshooting
Weer - A HTTP protocol debugger with Chrome DevTools frontend interface
Vistumbler - Vistumbler is a wireless network scanner for Windows Vista and Windows 7. Features:
Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy
Kismet - Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system.