Google+ Photos

I was a big fan of SnapSeed back when it was a standalone app.  When Google made it the default editor in Google+ they left all of the greatness of the original and paired it with some excellent features.

Auto Backup - automatically syncs every picture you take with your phone.

Auto enhance and highlights are nice.

Auto awesome speaks for itself.

Check out the photo features in Google+.  Who knows, you might get so excited that you start using Google+.