자유 운영체제, 공개 운영체제

[출처] http://www.theosfiles.com/general/osf_free_oses.htm

Free OSes

A number of manufacturers and groups provide OSes for free individual use, or in some cases, unrestricted use! Like anything that's free, don't expect printed manuals, CD-ROMs, or free technical support. Other than that, there are few, if any strings attached. Also note that with the size of most OSes, downloads of 1 to 10 GB of data may not be that exciting, so paying for the DVD/CD-ROM or even a low-cost base package may be well worth it to you.

The OS Files Link	Download	Comments
FreeDOS	download-page	An independently developed DOS, with source code
RxDOS	download-page	An independently developed DOS, with source code
Debian Linux	download-page	Linux download FTP sites
Fedora Linux	download-page	Red Hat's free Linux
Koppix CD Linux	download-page	Linux that runs directly from CD
Mandriva Linux	download-page	Linux download page
PCLinuxOS	download-page	PCLinuxOS download page
Red Hat Linux	download-page	Red Hat's download page
Slackware Linux	download-page	Download from HTTP or FTP
SUSE Linux	download-page	Download SUSE Linux
Ubuntu Linux	download-page	Download Ubuntu Linux
Darwin	download-page	Download (requires agreement acceptance, etc.)
Free BSD	download-page	Free Unix OS
NetBSD	download-page	Free Unix OS, supported on many CPU platforms
OpenBSD	download-page	Free Unix OS, supported on many CPU platforms
Solaris	download-page	Free download
AROS	download-page	Free, source code available
ReactOS	download-page	Free Windows compatible OS
SkyOS	download-page	GUI OS (in beta, was free, but now charging $30)
Visopsys	download-page	Free, source code available