Company Goldlausch Medienverlag UG (with limited liability) created these great apps:
Dr. Doodah: 100 first things (basic), Dr. Doodah: 100 first things, Dr. Dingsbums: 100 erste Dinge, Dr. Dingsbums: 100 erste Dinge - GRATIS, Dr. Dingsbums: Die ersten Dinge, Dr. Dingsbums: Die ersten Dinge HD, Sportbootführerschein Binnen 2013, Sportbootführerschein See 2013, Sportbootführerschein Binnen 2013 Free, Sportbootführerschein See 2013 Free, Seemannsknoten, Nautical Knots, and others..