Cntlm is an NTLM / NTLM Session Response / NTLMv2 authenticating HTTP proxy.
IP tunneling with the options for compressing and encrypting traffic.
List available hosts, open ports, and their characteristics.
HW Virtual Serial Port allows creating virual serial port drivers.
Simple Port Forwarding works with WebPages and not directly with your router.
Serial Port Software
Serial Port Splitter grants simultaneous access to a COM port from several apps.
Nonlinear Dynamics Ltd.
It is used to capture images from the APB ImageScanner for analysis.
Router Port Forwarding is a port forwarding and port triggering tool for router.
Parallel Port PIC Programmer uses PC's parallel port for communication.
COM Port Data Emulator is a tool for emulating a com port or an Ethernet device.
COM Port Stress Test is a tool for testing a COM or RS232 port (device).
1st Net Scanner is a useful IP Finder and Port Finder. It builds IP finder, port finder, IP scanner...
The vnar performs measurements on one port or two port networks.
ELTIMA Software GmbH
COM Port Redirector enables data redirection from one rs232 port to another.
Lalim Parallel Port Control can control hardware through the parallel port.