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- Mandelbrot Gallery (alternative gallery at Google)
Pictures of 'places' I found while zooming in the Mandelbrot set. - Blue Marble Navigator
A kind of self-made "Google Maps". Its main advantage is that you can see satellite pictures for each month, and of night lights. - Historische Denkzettel
Nostalgische Galerie von Werbeprospekten der Firma Vobis in den 1990ern. - Videotext-Rätsel '99
Auflistung merkwürdiger Botschaften, die 1999 im ARD/ZDF-Videotext erschienen. - Perpetual Calendar
Description of how to compute (in one's head) the weekday for any date.