Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy
BreachLock - BreachLock is a versatile platform that provides scalable and smooth penetration testing services for vulnerabilities.
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
Tenable.io - Tenable.io Cyber Exposure platform helps to protect any asset on any computing platform and eliminate blind spots.
Postman - The Collaboration Platform for API Development
Detectify - Detectify provides a user friendly and thorough web security scan that allows you to focus 100% on web development.