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.
Simple Port Tester is a neat application created to test TCP and UDP ports.
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.
List available hosts, open ports, and their characteristics.
upRedSun and iForwarder, Inc.
It will let you port forwarding to multiple IP addresses at the same time.
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.
Odamex Dev Team
Odamex is a free and open source port for the classic first-person-shooter Doom.
Daniel Scharrer, Sebastien Lussier
Arx Libertatis is a cross-platform, open source port of Arx Fatalis.
VirtualCOM-UDP is a software based UDP/COM Port Redirector solution.
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.
Falco Software, Inc.
This game can simulate driving a buggy in open areas within a large open world.
Use this software to open server side TCP/UDP Intelligent (proxy) ports.