EntityScripter is a Spigot plugin which lets you code your own mobs with a ridiculous amount of options (which I'm still adding, currently ironing out bugs first) using a .yml config per mob.

I decided to make this plugin because I wasn't satisfied at all with most of the custom mob plugins out there.

With this plugin, you can:

• add particles, potions, equipment of any kind
• set zombies to villager zombies
• set the age of ocelots
• set the mob to be hostile even if it's docile
• do things with the mob per tick
• do things according to various events that happen to the mob
• make the mob spawn naturally
• set the mob's drops, make the mob a pet
• randomize variables
• etc....

All still in progress, but I need help working on it. If you're interested in helping with development, go right ahead and submit some pull requests.

View an example config file here.