Even though this topic should be moved to another category, I would like to request this plugin as well.
@Chad this plugin provides support for importing from xenforo. https://github.com/akhoury/nodebb-plugin-import
There is one catch with that plugin. You will have to install NodeBB v1.0.0... complete the import and then upgrade NodeBB to latest version.
Chats are integrated into NodeBB. No plugin required. Supports one-to-one and group chats.