HW Virtual Serial Port allows creating virual serial port drivers.
Monitor open TCP and UDP ports and applications that open them on your PC.
SkPortScan ActiveX Control is a flexible and powerful port scanner control.
Active Ports monitors all open TCP and UDP ports on a local computer.
List available hosts, open ports, and their characteristics.
Scriptable data terminal supporting serial port, UDP, TCP client/server, etc.
Capture RTSP, RTMP, UDP, TCP, MMS, HTTP streams and render audio/video streams.
Global Web Monitor
Scans about 400 ports a second. It supports both the TCP/IP and UDP protocols. Select address range....
Sets itself up to listen on TCP and UDP ports commonly attacked over the internet. A total of 50 por....
Use this software to open server side TCP/UDP Intelligent (proxy) ports.
Freeware security configuration utility for Windows.
Can close TCP/UDP ports 135, 137-139, 445 and....
This DNS monitor does a simple lookup against both the TCP and UDP ports.
Simple Port Tester is a neat application created to test TCP and UDP ports.
It's a program designed to inspect system TCP and UDP ports and find open ones.
TAL Technologies, Inc.
TCP-File allows you to easily log TCP/IP data from any number of TCP/IP ports.