Until Android Wear comes to consumers, Pebble is going to continue to have the most robust app ecosystem of any wearable device. Music Boss is a particularly impressive app for the Pebble. It connects to your phone to control music playback with the Pebble's built-in buttons. The most recent update streamlines the process a bit by properly detecting what's going on with the phone.
Dropbox is probably the king of cloud storage. Well, if not the king, at least a high-ranking duke or something. So a great many people will be happy to hear the app is getting an update today to version 2.4, bringing with it a few design tweaks, as well as an interesting feature for linking new computers.
Attention residents of the UK, Canada, and Australia: Google would like to ask you some questions. In exchange you will be paid exactly one pittance. Don't complain or they'll cut it to, like, 0.75 of a pittance. But hey, free money is free money. All you have to do is grab the newly updated Google Opinion Rewards app and wait patiently for Google to call your number.
Facebook's new Messenger beta program is already making great strides with a jump to v4.0. You'll have to be in the beta program to get access, but it's quick to set up. Once opted in, you'll get to check out a few interesting new features in Facebook's chat app.
It's easy to forget that Amazon has cloud storage products on Android now that Google has started pushing the envelope with Drive and Play Music. Amazon does offer its own photo backup app connected to a free 5GB Cloud Drive block. The app wasn't great, but now that's being addressed with a significant update.