Plague is a really interesting way of providing a place for sharing stuff. The way it works is really neat. You browse through the feed and you can either: swipe down (no action taken, you just view the picture/article/whatever) or you can swipe up to send it to another 5 random people nearby. There's no such thing as friends, following or favourites.
If you got an information interesting enough, it can spread the whole world!
Plague is available on Google Play for free: