Most of the content on Hinterkattentuffel.de is german only. Currently I do not plan to change this but as I am author of some little computer programs, non german visitors might be interested into, I'll provide you with a list of english pages:
Piggy
Piggy is a program for generating web galleries. If you want to present your photos in the net, it may help you with some common tasks such as view images, rotate images, generate thumbnail images, generate webpages and upload files to your webspace.
Visit the Piggy homepage
GongFox
GongFox is a user interface for the windows messager service. You can send your team members at work messages such as "let's have lunch now".
Visit the GongFox homepage
Graphiclious
Graphiclious is a software tool that takes your del.icio.us links and generates webpages.
Visit the Graphiclious homepage