DevDo is an example App for the Parse platform used during a presentation on the allfacebook.de developer conference in Berlin on 2013-11-06.
More information here (german): http://klaus-breyer.de/?s=allfacebook+marketing
And the full presentation here (german): http://de.slideshare.net/fbmarket/parse-backend-as-a-service-allfacebook-developer-conference