All-U-Want

Features:
– Create and edit any item. Create items with unlimited enchantments up to level 32767, custom attributes, custom names, pretty much anything that can possibly be on an item. The items even work in creative multiplayer!
– Create and edit every aspect of any entity. Have you ever wanted an falling anvil riding an invincible creeper with a block of diamond on its head riding a spider with fire resistance riding an invisible saddled pig? Well now you can have one.
– Create and edit every aspect of any tile entity. You can now put that creature that you made into a mob spawner and have it spawn 10 of them every second. Then you can mark it with a sign with colored text. Then make everyone die with a beacon of wither and poison.

The possibilities are pretty much endless.