This is a Zombie Pigman Exp farm i made for my towny. The server is in 1.8.8 that's why its the version i published in, but it should work in almost any other version.

It has a simple hopper-to-chest collection system. With chests in the back to put the items in. (Though it could be hooked up to an advanced sorting system :which if you guys add and show me that would be cool).

You may edit it if you like, i just ask that if you re=post an edited version to put my name in the additional credit section.