Wallpaper Changer
This program has two remarkable properties: One - it can change your wallpaper (duh), and Two - it draws an unobtrusive calendar on your desktop in such a way, that it is visible without having to use a background on the letters. What other desktop changing programs do is that they draw the calendar, but use a white or black patch and draw the calendar on that. That is ugly. What I do instead, is to find the smoothest sector of the image, and draw the calendar on it using fonts and colors that make it visible. The result? A clean, minimalistic calendar on a wallpaper.
Download the source code.
Download the binary.
This program and its source code is licensed under the BSD 2-Clause license.
Last updated sometime in 2006.