Liquid Mobs allows you to turn mobs into goo, then back again
it was created for my making dumb minecraft mods series:
To create mob goo, make a mob die while standing on the saw block. You can then pick up the goo in a bucket and move it to the Reanimator. You goo will then turn into the mob.
Saved mob data (name, owner, color) etc will carry over.
This mod is mostly intended as a joke, but it is fully functional.
This mod will not receive any updates, bug fixes or ports, but it's licensed so anyone can do that if they really want.