Name of Plugin: Shopkeeper
Plugin version: v1.77 for 1.10 (Jul 14, 2016)
LinkBrief description on what it does and adds:
This plugin allows you to set up custom villager shopkeepers that sell exactly what you want them to sell and for what price. You can set up admin shops, which have infinite supply, and you can also set up player shops, which pull supply from a chest. It will also prevent any other trades with non-shopkeeper villagers if you want it to.
This would be rly cool for themed shops(role play at its finest), one could make a villager in a tavern sell potions, one in a library enchanted books, and so on.