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I personally consider it noteworthy that not all of the FreeBSD/PC-BSD distribution is licensed under the modified BSD License - you'll find a multitude of licenses in the package. The very much talked about ZFS filesystem, for example, is licensed under Sun Microsystem's CDDL, and you'll find a lot of other parts in the FreeBSD core distro that are not under BSDL, either (but at least distributed along with the rest, royalty-free); there are even some proprietary BLOBs in there. Of course, all the other software you mentioned that's not "officially" part of FreeBSD also comes under a load of varying licenses, down to the C compiler the project uses (which is GCC, by the way).

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