Free astronomical ephemeris software for pda

Wordful add-on Astronomical Terms list is an additional free word list of Astronomical Terms for the game Wordful for Palm OS by Beiks. The list contains about 1466 terms related with the Solar System, the Milky Way, constellations, the Space Program, etc.
System requirements:
- Palm: Palm III
- Palm OS 3.5
- Wordful

Designed for recording the timings of lunar grazings, lunar ocultations, asteroid occultations transits, meteor showers and any other astronomical observation that needs a record of the date and time to the nearest 10th of a second.

The time of each event is recorded on the screen and passed to the clipboard on exit, so can be pasted into any application.

The astrolib library calculates planetary positions and timezones.
Positions of sun, moon and planets up to Pluto are calculated with an accuracy of the order of one arc minute for dates less than a century away from now. Calculations are based on approximation formulae by Paul Schlyter, which are in turn based on a preprint of a paper by T. van Flandern and K. Pulkkinen "Low precision formulae for planetary positions", Astrophysical Journal Supplement Series, 1980.

Information is retrieved about locations and time zones on earth, based on UNIX time zone data. The data contains information for over 350 locations world-wide and is even useful for dates centuries before UNIX machines existed. The same information is provided for about 2000 additional locations which have been assigned to UNIX time zone locations.

Currently, astrolib is implemented as a shared library for Palm OS 2.0 or later. It requires the MathLib library. Because the time zone data has been compressed quite a bit and the calculations do not require any external ephemeris data files, the library is only about 100K.

The astrolib source code is distributed under the GNU Lesser General Public License. As I understand the license, this means essentially that you can use astrolib from commercial and non-commercial software, but that you cannot make a commercial product out of a modified version of astrolib. Redistribution under the GNU LGPL is, of course, possible.

This program calculates the day on which Easter falls for a specified year.
The program uses an algorithm due to J.M.Oudin (1940), which calculates the Sunday on which Easter will fall according to the first ecclesiastical full moon on or after March 21.
This application, Easter, was inspired by a chance visit to the U.S. Naval Observatory, Astronomical Applications Department (http://aa.usno.navy.mil/faq/docs/easter.html), when a group of friends were wondering when Easter break would be this year.
In the UK Easter break is a paid four-day long-weekend. But it is awkward to plan for because the date is not fixed. Maybe this program will help you get the best from Easter Break from now on.
System requirements:
- 6KB

This enhanced version is intuitive, easy-to-use and quick unit-to-unit conversion software.
It has configurable favorites screen for six unit categories of your choice enabling ready access to your frequently used conversions.
Performs conversions under unit categories like Temperature, Speed, Length, Area, Mass, Density, Light, Time, Volume, Pressure, Flow, Power, Force, Angle, Current, Acceleration, Frequency, Angular Velocity, Digital Resolution, Data, Astronomical Units and Torque.
This version not only has colorful icons but it is packed with more units and features.
Supports configuration of decimal point precision or scientific notations.
System requirements:
- Palm OS v3.0

Planets 1.0 supports you a complete and reliable application which contains a variety of interesting and useful information about the solar system is available location of the sun, moon, and planets in the sky, rise and set time of the sun, moon, and planets, civil, nautical, and astronomic twilight times, current and future moon phases, miscellaneous planetary information, and rotatable globe showing day and night.

Note: The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries."

Requirements:

• Compatible with iPhone and iPod touch
• Requires iPhone 2.2 Software update.

Taiyoukei is a software written in embedded Visual Basic 3.0 which provides abundant data about the Solar System, such as ephemerides, simulations and photo galleries in the form of add-ons.
Enhancements:
- Images of Dwarf Planets added to the Asteroids Menu.
- Elongation data added to Asteroids