Is it possible to develop applications for Roku in C or C++ as the SDK is written in C? If yes, how? If no, then which languages other than Brightscript can apps be developed in?
My understanding is yes, at least with games and the Marmalade SDK https://www.roku.com/developer. I actually just downloaded the SDK and have not looked at it in much detail yet, but as it seems, developing for Roku involves a mix of Brightscript, C++ and Java (Android). Hope that helps!