Roundcubeskins.net has a new Apple iCloud webmail skin. This is fully responsive and adjusts itself to desktop and mobile devices (iPhone, Android, Windows). It fully supports MyRoundcube plugins like Calendar, Planner, and more. This iCloud theme can handle RC 1.x functionality and plugins. Using this skin will feel like you are navigating Apple iCloud. It features a familiar interface and retina icons. The software can be installed on a variety of platforms and servers with ease. An alternative is Litecube desktop version is FREE for personal use.