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
tcpdump - tcpdump is a common packet analyzer that runs under the command line.
TablePlus for Windows - A native GUI tool for MySQL, PostgreSQL, SQL Server & more
netcat - Netcat is a featured networking utility which reads and writes data across network connections...
Postman for Mac (Beta) - Build, test, and document your APIs faster