Free Software Foundation, Inc.
Port Ping is a .NET Framework 3.5 Based utility application.
Simple Port Tester is a neat application created to test TCP and UDP ports.
List available hosts, open ports, and their characteristics.
Active Ports monitors all open TCP and UDP ports on a local computer.
Monitor RS232/422/485 COM ports in your system. Analyze and log serial port.
Virtual Serial Port Driver allows creating virtual serial port pairs on a PC.
HW Virtual Serial Port allows creating virual serial port drivers.
Reliable network and website monitoring. Sensor types include PING, PORT, HTTP, HTTPS, HTTP Advanced....
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.
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.