With the introduction of more power and capabilities, now mobile devices can do tasks that were considered impossible in past. Market for mobile applications is hot at the moment. There are different platforms used in different mobile devices, and each requires different ways and tools to develop applications. But once you have got a useful application you should be able to port it to different platforms. Most important thing you need is a useful idea and some programming skills. Android is a popular operating systems for mobile devices. Android is a software stack for mobile devices that includes an operating system, middleware and key applications. Android provides an SDK to develop applications for Android using Java Programming Language. There are many options available for development environments. You can use The Android Development Tools (ADT) plugin for Eclipse to add powerful extensions to the Eclipse integrated development environment. Each mobile devic