Brook

Brook is a cross-platform programmable network tool that helps users manage, monitor, and customize network traffic at the system level. They support TCP, UDP, IPv4, and IPv6 while enabling complete network control across desktop and mobile operating systems. Unlike standard proxy-based tools, Brook operates deeper within the system network layer, making it useful for developers, security researchers, and advanced networking users who need precise traffic routing and flexible network management. They also provide client-side and server-side programmability, allowing users to build custom rules for DNS handling, traffic routing, domain blocking, packet inspection, application-level controls, and network monitoring.

They include advanced capabilities such as DNS/DOH management, packet capture, MITM HTTP/HTTPS analysis, destination rewriting, application-based routing, region filtering, rate limiting, and multi-user server handling. Brook is designed for users who require custom automation, enterprise-grade traffic control, advanced networking workflows, and secure cross-platform connectivity across Windows, macOS, Linux, Android, and iOS. Their dedicated software is optimized for each platform to deliver stable performance, deep customization, reliable connectivity, and flexible deployment options for both individual and business use cases.

And the best part? They offer free downloads, while additional paid plans and advanced services are available depending on usage requirements.