Rails 3 using Devise: How to allow someone to log in using their Facebook account?

Question

I have a Rails 3 application using Devise for authentication. Now I need to allow someone to log in using their Facebook account. I think this is called Facebook Connect, bu

Answer 1

Here is a small application with integrates with Devise + Twitter + Facebook + Linkedin + Google + Github. All in one place.

You can find source here and a demo here