PortMapper - Do you need to map a specific TCP or UDP port on your machine to another port on another machine?
Raygun - Raygun gives developers meaningful insights into problems affecting their applications. Discover issues - Understand the problem - Fix things faster.
netcat - Netcat is a featured networking utility which reads and writes data across network connections...
Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.
Komodia Relay - Free open source tool to perform TCP based session relay
RabbitMQ - RabbitMQ is an open source message broker software.