FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon64, and EM64T), UltraSPARC, MIPS, ARM, PowerPC, and RISC-V architectures. It is derived from BSD, the version of UNIX developed at the University of California
... [More], Berkeley. It is developed and maintained by a large team of individuals. [Less]
Haiku is an open-source desktop operating system with the goal to create an innovative and seamless computing experience. Our first release will be an improved remake of BeOS R5, which was a commercial operating system created by Be Inc. After the company closed its doors a group of developers
... [More] decided to continue the BeOS as an open source effort. [Less]
The GNU Hurd is the GNU project's replacement for the Unix kernel. The Hurd is a collection of servers that run on the Mach microkernel to implement file systems, network protocols, file access control, and other features that are implemented by the Unix kernel or similar kernels (such as Linux).
AuroraUX is an operating system distribution based on the OpenSolaris kernel source base. The goal of the AuroraUX project is to create a high reliability core operating system using the US Department of Defense-developed Ada programming language. While it is meant to be minimalistic and used as a
... [More] base for other distributions, it will also be functional as an operating system in itself.
#auroraux @ irc.freenode.net [Less]