It is the missing link between devices that speak UDP on your network.
Active Ports monitors all open TCP and UDP ports on a local computer.
UDP Test Tool is both a UDP packet generator and listening application.
Monitor open TCP and UDP ports and applications that open them on your PC.
Simple Port Tester is a neat application created to test TCP and UDP ports.
upRedSun and iForwarder, Inc.
It will let you port forwarding to multiple IP addresses at the same time.
VirtualCOM-UDP is a software based UDP/COM Port Redirector solution.
The dialer uses one local UDP port and one local TCP port.
ServerTalk lets you communicate directly with a TCP or UDP port on a server.
NetworkActiv AUTAPF is a UDP and TCP port forwarder.
Serial Port Tool
Professional debug tool for serial port, TCP/IP, UDP, I2C, HTTP communication.
Scriptable data terminal supporting serial port, UDP, TCP client/server, etc.