557494 Simple Android Apps

We are looking to buy a simple android apps that could be used as a core for creating other similar apps (same functionality but different content, ideas). The app must be ALREADY developed and bug-free, have well-structured and clean code. Mainly we're looking for the entertaining apps. Here are some examples: X-ray apps, Cracked screen apps, Jigsaw puzzle apps, Photo effects apps, Jokes apps and other various database driven apps etc. Please provide details about your programming background, apps you developed and would like to sell.