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KStars is a desktop planetarium for KDE. It provides an accurate graphical simulation of the night sky, from any location on Earth, at any date and time. The display includes up to 100 million stars, 13,000 deep-sky objects, all 8 planets, the Sun and Moon, and thousands of comets and asteroids.

Nightfall is an astronomy application for fun, education, and science. It can produce animated views of eclipsing binary stars, calculate synthetic lightcurves and radial velocity curves, and eventually determine the best-fit model for a given set of observational data of an eclipsing binary star system. It is, however, not able to fry your breakfast egg on your harddisk. ;-)

Astro::PAL provides a Perl interface to either the Starlink PAL positional astronomy library. Return values are returned on the stack rather than being modified in place. In addition small utility subroutines are provided that do useful tasks (from the author's point of view) - specifically routines for calculating the Local Sidereal Time.

PyFITS provides an interface to FITS formatted files under the Python scripting language. It is useful for interactive data analysis and for writing analysis scripts in Python using FITS files as either input or output. PyFITS is a development project of the Science Software Branch at the Space Telescope Science Institute.

Sunclock is an X11 application that displays a map of the Earth and shows the illuminated portion of the globe. In addition to providing local time for the default timezone, it also displays GMT time, legal and solar time of major cities, their latitude and longitude, the mutual distances of arbitrary locations on Earth, the position at zenith of Sun and Moon. Sunclock can display meridians, parallels, tropics and arctic circles. It has builtin functions that accelerate the speed of time and show the evolution of seasons. Sunclock can be internationalized for various western languages. It is possible to customize the app-default file and enter additional city entries. Sunclock can commute between two states, the "clock window" and the "map window". The clock window displays a small map of the Earth and therefore occupies little space on the screen, while the "map window" displays a large map and offers more advanced functions. The Sunclock package includes a resizable and zoomable vector map. External Earth maps can also be loaded.

The SWISS EPHEMERIS is the high precision ephemeris developed by Astrodienst, largely based upon the DE406 ephemeris from NASA's JPL. Developers can license the Ephemeris library.Ephemeris users find 3200 years of read-made printable files of ephemerides, containing 19'200 print pages in PDF quality. The Swiss Ephemeris is available under a dual licensing model: GPL2 or Swiss Ephemeris Professional License.

KAudioCreator is an audio CD ripper, which uses cdparanoia as a backend to extract the tracks and later it encodes them to mp3 or ogg files (or many other formats supported). Features: - CDDB lookup to extract the album and track information - Different encoding formats supported (ogg, mp3, flac) - Different filename formats using tags

The asmixer utility is a mixer control for the X Windows environment. It is designed to work with the AfterStep Window Manager, but it will work with Window Maker or most any other Window Manager. It has controls for three configurable channels which are master, pcm, and cd volume by default.

The C* Audio Plugin Suite, is a collection of highly refined LADSPA units capable of (and intended for) realtime operation. The suite includes DSP units emulating instrument amplifiers, stomp-box classics, versatile 'virtual analogue' oscillators, fractal oscillation, reverb, equalization and others.

Herrie is a small command line music player. It has vim-like controls and has some unique features, like chroot()'ing and dropping privileges. It also supports submission of songs to AudioScrobbler. This makes it an ideal application for low-end jukeboxes.