Windows 10 Firewall Control - Windows 10 Firewall Control: simple and exhaustive solution for applications network activity controlling and monitoring.
Surge for Mac - Advanced Web Debugging Proxy for Mac & iOS
ZoneAlarm Free Firewall - Personal Firewall software
Weer - A HTTP protocol debugger with Chrome DevTools frontend interface
TinyWall - Lightweight and non-intrusive firewall
Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy