Vignette is a powerful camera app that is well worth picking up if you're looking to stylize your pictures. It may not have the power or ease of use of the photo-editing software on your computer, but it is far better than the default camera that most Android phones come equipped with.
Vignette lets you zoom and crop images as you take them. You can also edit shots taken with your standard camera app, which comes in handy when you forget to use Vignette while trying to snap pictures quickly.
Vignette boasts an impressive array of effects that you can apply to pictures--from altering the color of the filter, to changing the exposure, to framing the picture. But if you go a little too crazy, you'll regret that Vignette doesn't have an undo button.
Once you've mastered the app's editing process, though, you'll be impressed with how much Vignette can do.