Port Checker!

CurrPorts is network monitoring software that displays the list of all currently opened TCP/IP and UDP ports on your local computer. For each port in the list, information about the process that opened the port is also displayed, including the process name, full path of the process, version information of the process (product name, file description, and so on), the time that the process was created, and the user that created it.

PortsMonitor is a system utility for monitoring system TCP/IP network connections by application, and connections' status. With Search Expression support, you can filter connection with preferred conditions.