Examples of free software

The Free Software Directory maintains a large database of free software packages. Some of the best-known examples include the Linux Kernel, the BSD and GNU/Linux operating systems, the GNU Compiler CollectionC library; the MySQL relational database; the Apache web server; and the Sendmail mail transport agent. Other influential examples include the emacs text editor; the GIMP raster drawing and image editor; the X Window System graphical-display system; the LibreOffice office suite; and the TeX and LaTeX typesetting systems. It should be noted that not everyone agrees that all these are purely free software. Some view GPL software as non free and others view freedom on a scale with GPL being less free than copy-free (permissive) licenses and as such nothing is either "free" or "non-free". and