Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
Endpoints - View and respond to requests on an HTTP endpoint
RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.
AskBlocker - Browser extensions that keep permission requests in check
Regulex - Open-source, regular expression parser and visualizer.
HTTPS Everywhere - Chrome extension that encrypts and secures your browser