Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy
Amazon CloudFront - Amazon CloudFront is a content delivery web service.
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.
Netsparker - Netsparker is a tool for scanning web sites for security vulnerabilities.
Postman - The Collaboration Platform for API Development
Acunetix Vulnerability Scanner - Acunetix Vulnerability Scanner is a platform that offers a web vulnerability scanner and provides security testing to users for their web applications.