This is a very simple mod that allows Zombies to drop pretty much every other drop from the other hostile mobs in the game (enderman, creeper, skeleton, spider, and slime at the moment).
This is still in the early stages of the project, and I have in mind to add the ability to config what items to be able to be dropped and in what amount in the future.
This mod could be useful for modpacks, that reduce the sightings of the other mobs, such as ones made to "simulate" zombie apocalypse.