Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy
Postman - The Collaboration Platform for API Development
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.
TablePlus for Windows - A native GUI tool for MySQL, PostgreSQL, SQL Server & more
Postman for Mac (Beta) - Build, test, and document your APIs faster
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.