Competent planetarium. Extremely easy to use, complete with a small SAO star database, comet and asteroid and deep sky databases.
There are many more supplementary files available. You can download them from the webpage http://www.hnsky.org and just unzip them in the HNSKY directory (normally c:\hnsky ). Examples:
Non-English menu modules for the Italian, Russian, Catalan, Spanish, German, Czech, Romanian, Traditional Chinese, French, Portuguese Hungarian, Polish, Korean language.
PPM star database to magnitude 10.0 or 11.0 (468861 stars)
Tycho-2 star database containing 2.5 million stars to magnitude 12.(32 Mbytes)
GSC star database (15 million stars to about magnitude 15, (binary version 330 Mbytes)
UCAC2 star database and supplement.
Planetary images of Jovian moons, Saturn, Uranus and Neptune.
255 Deep sky images which will blend automatically within the map with the right size, orientation.
Deepsky help file containing about 10000 deepsky observations by Tom Lorenzin, Steve Coe and Steve Gottlieb.
43000 asteroid supplement.
Several deepsky and star supplement files such as the Yale catalog, binary and variable stars, messier objects, world map, 71000 Galaxies based on Leda data and a Milkyway supplement.
