Crewboard allows you to manage your flight crew duties in one single app: A detailed roster-overview, notifications, statistics, documents and more.
Within the last years I have released various apps for different platforms. The latest and currently supported one can be found here.
Wodel is an unofficial Jodel app for Windows 10 devices. It allows you to stay in touch with your community, synchronizes your karma between your devices and has special features not available in the official apps.
Kleine Anzeigen is an unofficial eBay Kleinanzeigen app for Windows 10 and Windows Phone. Search through millions of ads or manage your own posts.
Tankometer is the only app for Symbian which helps you to find the cheapest gas station near you while being in Germany. The app uses the database provided by clever-tanken.de.
PitlaneOne is a Formula 1® app for your smartphone or PC with the most important information: News, calendar, statistics, live data, results and championship standings.