Unfortunately most of my daily development happens behind closed doors. I cannot show any code without approval. As the old adage goes "if a module takes x effort to develop, it needs 3x to make it reusable in your other projects and 9x effort to make it reusable for other people". Over the years I have managed to extract the following:
EasyDentist is a commercial application aimed at dentists. It holds patient history and operations. It is implemented in Java and Swing. At the moment it only supports the Greek Language.
Project Elevate was my attempt to create a new workspace manager for Linux, using C and Cairo graphics. The project is now abandoned because of lack of time. Its ideas still hold and I may resurrect in the future.