RegexBuddy - RegexBuddy is your perfect companion for working with regular expressions.
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
Regex Forge - An Ultimate Regex Editor for macOS
RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.
Patterns - Patterns is a simple yet powerful tool for working with regular expressions.
Regulex - Open-source, regular expression parser and visualizer.