First, let me admit I didn’t think it would work. This is the 11th plugin I’ve tried… all the others being disappointments.To my surprise, not only does it work but it works well and with no modifications of any sort needed. One of my biggest issues with this is that I prefer keeping things in house… I don’t like giving another network registration functions such as this. What happens if/when OneALL goes down? You know?
http://wordpress.org/extend/plugins/oa-social-login/
It will require you to create an account at http://www.oneall.com/ and you will need your own keys for most of the social networks it uses but it works. You can test it on my site right now www.hauntedpaulding.com I may play with the placement a bit more but otherwise IT WORKS! It creates WP accounts, too. And we all love having that little list of registered users dashboard side!
Total time to setup (installing, API keys, Facebook, Twitter, OpenID), less than 5 minutes.