Here are some links to collections and other indexes of Linux astronomy software.
AstroMake is a utility intended to make installations of some common astronomical packages (in binary form) easy.
The linuxastro mailing list also contains a list of applications and packages. For more information, see linuxastro.
If the above does not appeal to your needs, these links may help:
Here is discussion of programs which run on Linux for use in finding objects, natural and man-made, in the sky.
XEphem has been the pet project of one of us (Downey) for the past 15-odd years. It has grown to become one of the more capable interactive tools for the computation of astronomical ephemerides.
XSky is by Terry R. Friedrichsen, firstname.lastname@example.org. XSky is essentially an interactive sky atlas.
KStars is a Desktop Planetarium for KDE.
Skymap is an astronomical mapping program written in Fortran and C for unix workstations by Doug Mink of the Smithsonian Astrophysical Observatory Telescope Data Center.
Xplns reproduces real starry sky on your display of X Window System.
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.
NOVA free Integrated Observational Environment for astronomers.
The advance of palm computers has taken hold. Linux has made its way to this realm.
Clear Sky Institute brings us the Personal Sky Chart for the Sharp Zaurus PDA.
Programs that classify themselves as simulators.
Astronomical Information Processing System (AIPS) is the heavy iron used by professional astronomers. AIPS++ is the place to find out more, but note that AIPS Classic also exists and is actively maintained.
Good ol' GNU Image Manipulation Program (GIMP) is a fine program to use for processing of digital images of all kinds and can prove useful for astro images as well.
A surprising number of applications deal with just the Sun and Moon.
This section discusses bits and pieces of software that can be used to form the basis for specialized projects.
Astrophysics Source Code Library is a collection of links to numerical astrophysical process models.
Astronomy and numerical software source codes is a collection of C codes related to astronomy.
CCD Astronomy on Linux. A library of routines that help control SBIG cameras.
Orbit - Be a space fighter pilot in Windows or Linux.
Every list needs a miscellaneous section, and this is it for Software.
IRAF is a gigantic but exceptionally capable astronomical analysis system, shepherded over the past 20-odd years by Doug Tody formally at NOAO. It has accumulated innumerable authoritative contributions from leading astronomers in all areas of astronomical data analysis. If you have a serious interest in astronomical data reduction and significant time to invest, this system will reward you mightily.
Xplanet Very realistic rendering program for Earth and other planets and moons. Uses X Windows and OpenGL.
StarPlot A 3-Dimensional Star Chart Viewer for Linux. Uses C++ and Gtk+.