[commercial - Windows] Observation planning software for astronomers. Includes telescope control, logging, and charting.
http://www.deepsky2000.net/
[commercial - Win95/98/NT] Thirty full-screen Hubble photos for use as wallpaper and screen saver.
http://www.screenthemes.com/packs/hubb001/index.htm
Freeware allowing one to draw charts according to the data of 15 catalogs of stars and nebulae, as well as the position of planets, asteroids, and comets. Available in English and is translated in 8 other languages.
http://www.stargazing.net/astropc/