Software:

http://www.abisource.com/

http://www.shatters.net/celestia/

http://www.stellarium.org/

http://www.mozilla.org

http://www.openoffice.org

http://www.gimp.org/

http://www.nvu.com/

http://cyberduck.ch/

http://fire.sourceforge.net/

http://www.uoregon.edu/~koch/texshop/texshop.html

http://wwwsearch.sourceforge.net/bib/openbib.html