KDE Visual Design Group/Plasma Mobile
Concept
See KDE HIG for guidelines on this design approach.
Plasma Mobile Vision
Plasma Mobile is Free and Open Source software with the intended goal of liberating the creative process and project control, and giving it back to the community and the creators.
A Phone OS built from the ground up in a modular way and audited in an open development process to provide the customization options KDE is famous for and the privacy focus Linux and Open Source software stand for.