The Free Software Directory (FSD, or simply Directory) is a project of the Free Software Foundation (FSF). We catalog useful free software that runs under free GNU-like systems, not limited to the GNU operating system and its GNU/Linux variants. If they don't currently run on GNU, at least it probably isn't hard to adapt them to run on GNU. Many of those programs also runs on proprietary operating systems which can be used to replace nonfree software.
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