UDP Test Tool is both a UDP packet generator and listening application.
HW Virtual Serial Port allows creating virual serial port drivers.
Monitor open TCP and UDP ports and applications that open them on your PC.
SkPortScan ActiveX Control is a flexible and powerful port scanner control.
Active Ports monitors all open TCP and UDP ports on a local computer.
Scriptable data terminal supporting serial port, UDP, TCP client/server, etc.
Capture RTSP, RTMP, UDP, TCP, MMS, HTTP streams and render audio/video streams.
TCPCOM32 is designed to be a serial port to TCP/IP connection mapper.
Bridging RS232/RS485/RS422/TTL Serial Port and TCP/IP.
The dialer uses one local UDP port and one local TCP port.
NetworkActiv AUTAPF is a UDP and TCP port forwarder.
Serial Port Tool
Professional debug tool for serial port, TCP/IP, UDP, I2C, HTTP communication.
ServerTalk lets you communicate directly with a TCP or UDP port on a server.
Simple Port Tester is a neat application created to test TCP and UDP ports.
Art of Ping
PingFu UDP transmits UDP packets encapsulated in the TCP communication protocol.