Various projects I have worked on the last several years:

python-based webapplication for the management of text reports about students. Includes a smart email poll agent (IMAP) for processing mails from teachers into a database, aggregation reports for each class and dynamic RTF generation of the student reports.
Topic Map Navigation tool designed jointly with Christoph Fröhlich, based on the open source topic map library for Java TM4J.
Java library which allows a unified access layer for news channel handling. Currently supported formats: RSS (Rich Site Summary) 0.91, 1.0 and 2.0. Includes full-text search support (Lucene integration) and persitent storage through Castor JDO.
RSS channel manager for browsing news stories gathered from different channel subscriptions (Open Source project).
Simple navigator for tree access allows to display and walk-through hierarchical SQL results (Open Source project).
2D viewer and analyzer of 3 dimensional data volumes acquired by MR scanners, developed as part of my diploma thesis in Biophysics (Open Source project).
Navigational help for retrieving information about Egyptian temple scenes, developed for the Egyptian Institute at the University of Würzburg.
LAMP (Linux + Apache + MySQL + PHP) project for managing the articles and reviews on the website of the german music magazine intro. As an experiment I have started to create a topic map for their content as a base for a new portal. But be prepared it is quite huge and contains around 72.000 TAOs, the compressed intro XTM (size approx. 1.45 MB).