This is an incomplete list of publicly available software I am or have been working on.

Codeling
A tool prototype for integrating architecture information with program code. This is the tool prototype for my PhD thesis.
Pattern Proposal
A tool prototype for proposing patterns based on a catalogue of questions. This tool was part of the DFG project GenEDA 2009 - 2012.
SeqCon-OSGi
A tool prototype for using sequential contracts for services in the OSGi Service Platform.
SeqCon-JEE
A tool prototype for using sequential contracts for services in the Java Enterprise Edition.
Kursanmeldung
A service for my faculty at the University of Duisburg-Essen. Students can register for courses online. It is integrated with the login services of the university. I co-author this software since 2006.
IT-Standort-Essen
A service for the local and transregional businesses in Essen, Germany. In cooperation with the IT-Forum Essen c/o EWG - Essener Wirtschaftsf├Ârderungsgesellschaft mbH. I co-authored this software between 2008 and 2011.
CampusKontakt
A job portal for the University of Duisburg-Essen. Later replaced by another service. I co-authored this software between 2006 and 2010.