Company Steffen Keller created these great apps:
TapSeven, Touch., Thunderstorm Location Calculator - Get Distance & Location of the next Thunderstorm!, It's 420 Somewhere, PlateSnap - Archive the License Plates of your Parking Neighbors!, Lock picking, Physik Formelsammlung+, Einnahmenüberschussrechnung, BillMore - Create Invoices, GHV Wasseralfingen, and others..
