Android
We've developed more than a couple of Android apps, but most of them are covered by a NDA, so we can't show those.
However, we can show screen-shots of the prototype of a photo up-loader app we did for Ritz Camera. Ritz Camera eventually decided to put on the Android Market another up-loader by a different developer -- done in a more iPhone-ish style -- and so made it possible for us to publish these screen-shots.
The app uses:
web services
background processes for upload
notifications
camera hardware
a tab-based user interface
swipe-scrollable thumbnails gallery of images