The NetBSD Project. Dragonfly BSD. A technical introduction: The ultimate goal of the DragonFly project at its inception was to provide native clustering support in the kernel.
This type of functionality requires a sophisticated cache management framework for filesystem namespaces, file spaces and VM spaces. These and other features eventually culminate in the ability to allow heavily interactive programs to run across multiple machines with cache coherency fully guaranteed in all respects. This also requires being able to divide resources, including the cpu by way of a controlled VM context, for safe assignment to potentially unsecured third-party clusters over the internet. This original design direction, although no longer the primary goal of the DragonFly BSD project, has influenced many of the design decisions made in the intervening years.
Www.bsd.org. OpenBSD. The FreeBSD Project. Gnome meet FreeBSD. Storage For Open Source. PC-BSD. m0n0wall. m0n0wall is a project aimed at creating a complete, embedded firewall software package that, when used together with an embedded PC, provides all the important features of commercial firewall boxes (including ease of use) at a fraction of the price (free software). m0n0wall is based on a bare-bones version of FreeBSD, along with a web server, PHP and a few other utilities.
The entire system configuration is stored in one single XML text file to keep things transparent. m0n0wall is probably the first UNIX system that has its boot-time configuration done with PHP, rather than the usual shell scripts, and that has the entire system configuration stored in XML format. Announcement regarding the freeze of the mailing list and forum, with some pointers on where to go for m0n0wall successors.