tcpdump - tcpdump is a common packet analyzer that runs under the command line.
Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy
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.
Postman - The Collaboration Platform for API Development
Ettercap - Ettercap is a suite for man in the middle attacks on LAN.
netcat - Netcat is a featured networking utility which reads and writes data across network connections...