My contributions to other OpenSource Projects can be found on
To avoid mixing up things I set up another blog to cover security topics called sec.sexy.
I have created several iOS apps that have been published in the AppStore beginning with iOS 2.0 (where Apple introduced the AppStore). Some appliacations have been created for customers some for my Startup [see iOS-projects (German)]
Since 2001 I was involved in several web based projects / applications for customers or startup or simply as a hobby. Most of the projects are listed: Web-Projects (German).