Selfies – no, I can't say I am particularly excited about them. But if they float your boat, then Frontback might be the app you have been looking for. Quite simply, it lets you take a photo with the main camera, one with the front camera, and then combine the two. You can share the fruits of this exercise via SMS, Facebook, Twitter, Tumblr, email and so on – just as you would any photo.
Now, this doesn't have to be just a boring old mugshot of yourself taken with the front camera, of course. Your cat, dog, a scene over your shoulder, or anything else you can think of is fair game. There's a sharing community of course, so you can share those fantastic selfie-including photos with other people. And because it is possible to be just too social, there's a rather clever blocking feature. Say you don't like someone, you can block them. It's harsh, but it means you won't have to see their stuff.
OS: Android, iOS