Simple Port Tester is a neat application created to test TCP and UDP ports.
Active Ports monitors all open TCP and UDP ports on a local computer.
Serial Port Mapper - Assign new names for serial ports.
List available hosts, open ports, and their characteristics.
HHD Software, Ltd.
It allows you to create virtual serial ports and emulate their behavior.
Simple Port Forwarding works with WebPages and not directly with your router.
Odamex Dev Team
Odamex is a free and open source port for the classic first-person-shooter Doom.
Daniel Scharrer, Sebastien Lussier
Arx Libertatis is a cross-platform, open source port of Arx Fatalis.
Daytona Sensors LLC
When launched for the first time, the program uses COM1 as the default port.
How wide open is your computer?With LPS you're able to check your computer foropen or listening port....
Port Listener XP is designed to open up fake ports.
usbpicprog is an open source Microchip PIC programmer for the USB port.