NetLimiter - NetLimiter is an ultimate Internet traffic control and monitoring tool designed for Windows.
Fiddler - Fiddler is a debugging program for websites.
NetBalancer - NetBalancer is a Windows application for local network traffic control and monitoring.
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
Bandwidth Manager - Bandwidth management, bandwidth limiting and traffic shaping software for Windows
HTTP Toolkit - Beautiful, cross-platform & open-source tools to debug, test & build with HTTP(S). One-click setup for browsers, servers, Android, CLI tools, scripts and more.