Hello
I am currently work as Xamarin android developer for a local company and I developed some Android application such as warehouse management, small accounting, an special application that controls another company hardware with Sms commands and make reports on charts, datagrid, and some more feature and one another ongoing android application which will use to managing another hardware devices as such as intelligent house.
but my current application is not in English language but if you want I can send you an screenshot or either Apk package with some source code of my application.