Windows Azure Toolkit for Windows Phone 7, iOS (iPhone & iPad) and Android.
You need an example?
We shipped the full source code of BabelCam, which is now available in the Windows Phone Marketplace. This mobile application allows you to take a picture of text and turn it into characters while letting you translate into a different language at the same time – great for trying to understand foreign restaurant menus! BabelCam was initially created as a sample for a presentation at MIX 11. Iit is a good demo is that it uses a number of services, including Windows Azure web and worker roles, Windows Azure storage (blobs, tables, and queues), the Microsoft Push Notification Service, Project Hawaii’s OCR Service, and the Bing Translator.
For more details, please refer to the following posts: