Star Pilot - The most full featured program on the market for the Palm Computing Platform ®. Star Pilot has a database of almost 1500 stars and 88 constellations as well as the ability to plot the position of planets, the sun, and the moon in the sky.
Sol! II - computes Sun Rise, Sun Set, Day Length, start and end of Civil, Nautical, and Astronomical Twilight, and the length of day with twilight times added for any location on the planet. Sol! II has a Sun Information and Sun Compass display and can automatically adjust for Daylight Savings Time (DST) in 50 different time zones. In addition, Sol! II also now includes a sun tracker that plots the position of the sun through its daily arc!
J-Moons! - A program that shows the current position of the Galilean satellites of Jupiter
Solstice! - A program that computes solstices and equinoxes for the years 1904 to 2031