Company Max-Planck-Gesellschaft created these great apps:
MaxPlanckApp, MPR eMagazine, MPF E-Magazin, Animal Tracker, PhotonLab Quiz, DahlemTour Berlin Audioguide, EcoBus, Bilder aus der Wissenschaft, Animal Tagger, Language Cycles, CovSocial, MaxCine Expedition, Aby Warburg's Florence, and others..