Free Software Foundation, Inc.
Port Ping is a .NET Framework 3.5 Based utility application.
It is a command-line tool that will discover your network and services details.
Simple Port Tester is a neat application created to test TCP and UDP ports.
List available hosts, open ports, and their characteristics.
Virtual Serial Port Driver allows creating virtual serial port pairs on a PC.
Simple Port Forwarding works with WebPages and not directly with your router.
Active Ports monitors all open TCP and UDP ports on a local computer.
Reliable network and website monitoring. Sensor types include PING, PORT, HTTP, HTTPS, HTTP Advanced....
Seer is a finger and ping utility that detects when you are online and constantly monitors up to 30....
Send an ICMP packet (ping) to a device, connect to a required TCP port.
Diagnostic program that includes ping, traceroute, and port scan functions.
Router Port Forwarding is a port forwarding and port triggering tool for router.
HW Virtual Serial Port allows creating virual serial port drivers.
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).