Plasma Phone OS, a KDE project for mobile

Plasma Phone OS (or simply Plasma Phone) is a complete software stack for mobile devices and includes the following libre technologies: Plasma Mobile (a Plasma-based shell), KWIN/KWayland, Voicecall, Ofono, RIL, OHM, Telepathy. It allows to run several Qt-based applications to run on top of it, for example: Plasma apps, Ubuntu Touch based apps, Sailfish OS based apps, Nemo based apps.The website is pretty minimal, but the first few comments on this Hacker News post gives a good overview.