You just wanna play Minecraft together?
If you want your friends to join your world, just download CraftIP, click connect and send the IP to your friends. They will be able to join as if it was a normal server.
How does it Work?

Finally, copy the server IP and send it to your friends so they can join!
Download
For Linux and Raspberry PI support, checkout the source code.
Contact
If you have any problems, feel free to reach out at