Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
Mac CLi - OS X command line tools for developers
RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.
Phunt - Product Hunt command line interface
Regulex - Open-source, regular expression parser and visualizer.
speedtest-cli - Test your download speed using SpeedTest on the command-line