Simple Port Forwarding works with WebPages and not directly with your router.
A peer-to-peer voice-enabled LAN instant messenger.
List available hosts, open ports, and their characteristics.
Virtual Serial Port Driver allows creating virtual serial port pairs on a PC.
Serial Port Software
Serial Port Splitter grants simultaneous access to a COM port from several apps.
Barcode scanners can be connected to PC through serial port or USB port.
Bill Serial Port Monitor utility is a Serial RS-232 COM ports monitor.
ELTIMA Software GmbH
Virtual Serial Port Driver creates virtual serial ports.
Mohammad Ahmadi Bidakhvidi
This port scanner has the ability to scan multiple ports and multiple IPs.
Get port distance information from a list of 12,000 ports with weather forecast.
Port Listener XP is designed to open up fake ports.
Serial Port Mapper - Assign new names for serial ports.
Tucson Software Services
Port Forward is Windows Service which forwards any arbitrary set of local ports.
Access ports on computers behind firewalls/routers via reverse port forwarding.