Need Help Willing to Pay

I need help finding or programming a program like this website has. https://www.readyforhillary.com/action If you go to the page scroll down a little it will say get your friends involved, this is were people can log in via Facebook and post post to their Facebook from our website send things out to their friends. If so one knows how to get a program like this or make a program like this website has I'm willing to pay them. Let me know if anyone can help. Sorry for the bad description the best way to see what I mean is visit the website and check it out.

So you want a facebook Login Button?

https://developers.facebook.com/docs/plugins/login-button/
https://developers.facebook.com/docs/javascript/quickstart/v2.0
https://developers.facebook.com/docs/wordpress/


There are plenty of tutorials/scripts/plugins out there.
http://www.oauthlogin.com/