Rudy Huyn‘s Secret app, 6cret was published to Windows Phone store, then unpublished due to a bug and is now resubmitted to the store post bug-fixing. So, it should be live in some time, again.
@benriga yes, the app has been unpublished for that (winrt bug with webview), an update has been submitted 15 seconds ago 
— Rudy Huyn (@RudyHuyn) September 12, 2014
Features:
Share anonymously with friends, co-workers and people nearby. Find out what your friends are really thinking and feeling.
• Secret posts come from friends, but you won’t know which one.
• Write back anonymously.
• When people love your secret, it spreads to their friends and can travel around the world.
Say what you’re really thinking and be yourself.
Install link (Will be available soon, if not available now)
