Surge for Mac - Advanced Web Debugging Proxy for Mac & iOS
Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
Weer - A HTTP protocol debugger with Chrome DevTools frontend interface
Ettercap - Ettercap is a suite for man in the middle attacks on LAN.
James - James is a HTTP Proxy and Monitor that enables developers to view and intercept requests made from...
tcpdump - tcpdump is a common packet analyzer that runs under the command line.