NetLimiter - NetLimiter is an ultimate Internet traffic control and monitoring tool designed for Windows.
Surge for Mac - Advanced Web Debugging Proxy for Mac & iOS
NetBalancer - NetBalancer is a Windows application for local network traffic control and monitoring.
Weer - A HTTP protocol debugger with Chrome DevTools frontend interface
NetSpeedMonitor - NetSpeedMonitor is a lightweight Network Monitoring Toolbar for your Windows Taskbar
Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy