Astro Info - An astronomical ephemeris/almanac for PalmOS. It displays some basic information useful to star gazers, such as rise, trans and set times, coordinates, magnitude and phase information for Sun, Moon, the other 8 planets and stars.

Star-Pilot.com - Has astronomy programs for Palm users.

Pocket Stars - Pocket Stars is a high accuracy star chart, ephemeris, and Celestial Navigation calculator for the Pocket PC.

Leo's Void - A Planetarium for Pocket PCs.

Sidereal for PalmOS - A very simple and small program for the Palm OS intended to display continuously your local sidereal time. 

SpacePDA.net - A site with NASA tech news and a media gallery on aeronautics, flight technology, and other related fields.

Infinity Scopes - Designs, manufacturers, and markets Palm PDA wireless digital locating systems for telescopes.

P-Moontool - Shows the Phase of the Moon on Palm OS devices.

SunAngle - Displays data about the Sun's rise time, set time, and its current bearing for Palm OS.