Action Snap for Android lets you use your phone's camera to take analog-looking lomographic photos.
Because it can snap a series of photos rather quickly, Action Snap is great for capturing action shots. Hit the shutter button, and the app will shoot four or nine photos (you choose) in quick succession, and arrange them into a single print. It can arrange your series into a horizontal configuration, 2x2, 3x3, or a single image. Adjust the shooting interval from 0.1s to 5s to capture different ranges of action. Or if you like, switch to custom mode to snap each photo manually.
Effects-wise, Action Snap is pretty light. You can switch between LOMO and LOMO Blue, which each apply different styles of vignetting, or Sepia. Beyond that, there's not much else, other than standard sharing via Twitter, Facebook, or whatever else you've got installed on your device.
While Action Snap does have a few neat tricks, it could've definitely benefited from at least a few more lomographic effects. Also, it would've been nice if it could output higher resolution photos. For hard-core lomography fans, especially those in love with the old LOMO Actionsamplers, Action Snap might be worth a try. Otherwise, there are certainly more full-featured camera apps in the market.