I've been checking out this website with a bunch of one-command mods in vanilla minecraft. This one would be a great add in my opinion. The website is: http://mrgarretto.com/cmd/conveyorbelts. It moves items on a conveyor belt which would be really really helpful, transporting items to your friend so you don't have to walk to them yourself. EG: An alliance has a conveyor belt system between them, and they can send resources to each other with the conveyor belts. They can support ANY entity.