Unistal Systems Pvt. Ltd.
Port Locker helps you protect valuable information from your computer.
A firewall with user-level access controls for Windows 9x/Me.
B&W Port Scanner is a program that will scan your TCP ports.
A handy suite of network tools to help get your ports forwarded.
A tool to provide a visual means to send and receive data through serial ports.
PortSight (business unit of Moravia IT, a. s.)
PortSight Secure Access is a .NET security component for user management.
Serial Port Software
Serial Port Splitter grants simultaneous access to a COM port from several apps.
HsGpsDll provides access to the GPS receiver via a serial port.
Access ports on computers behind firewalls/routers via reverse port forwarding.
This module encapsulates the access for the parallel port.
Python pyserial is a module that encapsulates the access for the serial port.
Shipping Guides Ltd
FindaportCD gives you access to the most comprehensive port information.