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

tcpdump - tcpdump is a common packet analyzer that runs under the command line.

Cellist - Cellist is an all-in-one HTTP debugging proxy software designed for OS that provides a straightforward approach to put a proxy between the HTTP client and the internet.

netcat - Netcat is a featured networking utility which reads and writes data across network connections...