If you use an Android phone — and I know a few of you do — this is a must-download. VSCO Cam is undoubtably my favourite photo editing app for iOS, and I’m sure it’s just as great on Android.
Update: I’ve seen a few complaints about the UI, especially its reliance upon symbolism. It’s a little tricky to get used to; it isn’t as easily-discoverable as, say, Snapseed or Analog. But if you’ve ever used Lightroom or Aperture, the symbols will all feel similar to you. It’s very powerful once you get the hang of it.