I want to know What are all the sdk's available to develop application for Window surface RT? Does Surface SDK will support all the tablets having Windows RT OS Installed?
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If you want to make "Modern" apps. That is the tile-based applications that work only on Windows RT, you can just head over to http://msdn.microsoft.com/en-us/windows/apps/br229516
That should give you all the information you need. And yes, if you create a Modern App, it will work on Windows RT, and Pro. The best way to distribute this is to sell it on the Windows 8 store. Good luck.