Web frontendDeveloper toolsby zhengchalei
PortPilot
A Windows port manager: lists processes holding TCP and UDP ports and ends them after you confirm.

About
A Windows port manager in the vein of Task Manager that lists only processes holding ports, built with Go and a MyGo web frontend in WebView2. It reads TCP and UDP ports through the Windows IP Helper API, searches by port, name, PID or address, refreshes every 5 seconds, and ends a process after showing the ports it affects, refusing system processes and checking for PID reuse.