Active Ports

Active Ports screenshots

Active Ports monitors all open TCP and UDP ports on a local computer

Alternative downloads

Serial Port Monitor
7.0.342
Displays, logs and analyzes all serial port activity in a system.
Port Forwarding Wizard Enterprise
4.8.0.1
It will let you port forwarding to multiple IP addresses at the same time.
Magneto Software Port Scanner ActiveX Control
5.0.0015
SkPortScan ActiveX Control is a flexible and powerful port scanner control.