open-source software

• Planet Finder - an applet that shows the locations of the planets, stars, moon, and sun in the sky from any location and for any date and time
• Spotter - a program that lets students check their answers to math and science questions
• OpenGrade - software for teachers to keep track of grades
• When - an extremely simple personal calendar program, aimed at the Unix geek who wants something minimalistic

In addition to these, some of my smaller or less polished software projects are available via my personal page.