I am one of the most downloaded Themes Author at MyBB. I will create custom MyBB responsive theme for you OR You will tell me what kind of Forum you run. General Topic of Forum determines general Theme design. I'll need some basic info about Color variations, Fonts etc ...Do you want sidebar or not ... Logo and general branding is included. I will NOT create custom Plugins, BUT I can adjust any MyBB Plugin to your Theme's general design direction and make non-responsive Plugins to be responsive also.