Free Software Directory:Free software replacements
Here is a list of popular free software applications that we recommend to replace common proprietary applications. Ceasing to use proprietary appliations is a good way to start migrating to freedom.
We have a separate list for each operating system because some of the free replacements don't run on all the operating system.
Free operating systems
Nonfree operating systems
After you replace the nonfree apps, how about replacing the nonfree system next? For your freedom's sake.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.
The copyright and license notices on this page only apply to the text on this page. Any software or copyright-licenses or other similar notices described in this text has its own copyright notice and license, which can usually be found in the distribution or license text itself.