We need a simple app that uploads displayed image selected from our C# Windows App UI and our Cocoa# Mac UI to Facebook, Twitter and Instagram.
1) Dialog has 3 buttons such as Facebook, Twitter and Instagram that user can choose from.
2) If you press any button such as FB or TW or Instagram, it uploads the displayed image into their user account on the site.
3) Use Facebook API to develop if needed.
The app must run on Windows and Mac.
The language on Windows have to develop with C#.
PM for details.