HostsMan - HostsMan is a freeware hosts file manager and editor. Built-in hosts file updater
Fiddler - Fiddler is a debugging program for websites.
Gas Mask - Gas Mask is simple hosts file manager for Mac OS X.
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
simplewall - Simple tool to configure Windows Filtering Platform (WFP) which can configure network activity on...
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.