Company Wolfgang Loechteken created these great apps:
rechenapp, remember the duck position, beer adventure, baby adventure, TV mind game, beer adventure 2, tool worker, farmer, eye test circle, remember position national flags, book mind game, parachute jumper, eye test circle 2 navigation, eye test open symbol 2, eye test open symbol 2 camera photo picture, eye test circle 3, Sehtest Kreisöffnungen, Sehtest Augen Arzt, Sehtest Fahrschule, Math against the clock, math against the clock 2 think, and others..