The Mineralogy Database contains 4,442 individual mineral species descriptions with links and a comprehensive image library. Recent additions to the image library include barite, zinkenite/stannite, and zanazziite/kosnerite. There's also a clickable periodic table, that lets you pick an element and see information about minerals that contain it. Learn about crystal forms with a fun little java applet. Search for minerals by cleavage, color, diaphaniety, habits, hardness, and more.
posted by owhydididoit on Sep 1, 2006 - 9 comments

AlexWarp is a small java applet that lets you warp, stretch, distort and then save image files.
posted by carter on Jul 3, 2004 - 3 comments

The Secret Lives of Numbers A couple of programmers took it upon themselves to use "a popular search engine"(just say it: Google) to determine the relative popularity of every integer up to one million. Even if you just take it as a big case of overthink, it's kind of fun to play with the Java-based visual representation, which provides some of the terms associated with the numbers as you click on them.
[Short warning inside; read before visiting.]
posted by Su on Feb 11, 2002 - 20 comments