Kube is beautiful, modern communication in a reliable, high-performance nativegroupware application for your desktop, laptop and mobile devices Kube is a next-gen communication and collaboration client built with QtQuickon top of a high performance, low resource usage core. It provides online andoffline access to all your mail, contacts, calendars, notes, todo's and more. With a strong focus on usability, the team works with designers and UX expertsfrom the ground up, to build a product that is not only visually appealing butalso a joy to use. While the initial focus is on Linux, the desktop and email, the platform isbuilt to run on all desktop systems as well as on mobile devices. It willeventually evolve into a full collaboration client including contacts,calendars, notes, todos, instant messaging etc. This talk is giving an overview of what Kube is and strives to be, along withsome history why this effort has been started in the first place. The talk will go into some technical detail, but is suitable for anyoneinterested in an alternative to the currently existing groupware clients.