The greatest collection of open source and free software
Calc is the spreadsheet component of the LibreOffice office suite. (LGPL)
Linux - FreeBSD - Windows - MAC OS X
Gnumeric is a free spreadsheet program that is part of the GNOME desktop. (GPL)
Linux - FreeBSD - Windows
Use the Open Source Software Directory to find the best open source and free software for at home or in business.
Advantages of open source software are: