API for posting to all social networks for all platforms

Hello. I need a single API to allows users of my Unity app to post to Facebook, twitter, google+, linkedin, tumblr, instagram, etc, etc etc, on iOS, android, windows mobile, etc etc. Best solution for this problem?

I found one! its called Unishare!!

Cross Platform Native Plugins allows share via

  • E-Mail
  • SMS
  • Facebook
  • Twitter
  • Whats-App

It supports iOS and Android platforms with a unified interface.