Yeah this would be a good plugin. Right now the gravatar subsystem is very tightly integrated with NodeBB, so it's going to take some effort to untangle it 😓
OAuth Service Providers
I've been looking around off and on all day. But is anyone aware of an OAuth Service Provider? For example, for our site we are looking to implement OAuth across all of our applications for Single Sign On. We are hoping to outsource it to alleviate some of our development and free us up to work on other things.