Memento is a photography app for your Windows Phone that lets you apply one of nine film effects to your photographs. Memento has a simple, straight forward interface, some cool filters but does have room for improvement.
The main menu offers options to take a picture to edit, load a picture to edit, view your gallery (images already tweaked) and tap into Memento's settings. Settings are limited to turning on/off the app's Facebook integration.
If you opt to take a picture, the app will launch your Windows Phone camera app and return once you accept the new image. If you choose to apply the effects to an existing photo, just pick the image out from your Pictures Hub and you're in business.