ZNPCs
This enhancement supports Spigot, Paper & Forks
Section titled “This enhancement supports ”ZNPCs is another popular NPC plugin. Although it is better than Citizens from a performance perspective, it is quite janky and unpleasant to setup.
Spigot View ZNPC's official Spigot page for downloading the plugin.
ZNPCsPlus
Section titled “ZNPCsPlus”ZNPCsPlus delivers great performance while also being easy to setup & edit. Recommended as long as you don’t mind the lack of support in other plugins for it, V2 can be compiled from the GitHub page.
GitHub View ZNPCPlus's official GitHub page for downloading the plugin.