You may freely use and modify these programs under the Gnu Public License. Generate thumbnail images for a bunch of .jpg image files. Resize a bunch of images smaller, and also make thumbnails. But some of the applets are useful as they stand. There are pointers to the source on the page for each applet.
Moon Phase Show the moon's phase.
Difficult to use UI, and I've trimmed down the star catalog because it took up too much space and took too long to download. I also have a bunch of Javascript code on the Hitchhiker's Guide to the Moon to calculate the moon's phase and libration. I'm learning to write Palm apps, and I have a very minimal attempt at a moon ephemeris program called lunatic .