Apps with 'port monitoring' feature

Robotalp is an all-in-one monitoring solution that ensures your website's uptime and performance with 11 different monitoring functions and a status page.

A self-hosted, real-time port monitoring and discovery tool.

A lightweight macOS status bar app that monitors and manages development processes running on ports 2000-6000. The app provides real-time process detection and allows you to kill individual processes or all processes at once.