NetBSD is a free, secure, and highly portable Unix-like operating system available for many platforms, from large-scale server systems to powerful desktop systems to handheld and embedded devices. Its clean design and advanced features make it excellent in both production and research environments, and the source code is freely available under a business-friendly license. NetBSD is developed and supported by a large and vivid international community. Many applications are easily available through pkgsrc, the NetBSD Packages Collection.
MirBSD originated as a patch set against OpenBSD-current, an ultra secure operating system and NetBSD derivate, and has since also incorporated changes from NetBSD, a 4.4BSD-derived ultra portable operating system. It features bugfixes, code removal for the sake of simplicity, and feature enhancements over stock OpenBSD as well as a much more up-to-date GNU toolchain, careful integration of patches from other projects (such as KAME), and many improvements. It works on the Intel Pentium and some 80486 machines with more than 32 MiB RAM and the SPARC, and a port to the PowerPC Macintosh is in preparation.
Chiron FS is a FUSE based filesystem that implements replication at the filesystem level like RAID 1 does at the device level. The replicated filesystem may be of any kind you want; the only requisite is that you mount it. There is no need for special configuration files; the setup is as simple as one mount command (or one line in fstab).
dmassage uses the information in a BSD system's dmesg to gather information about the system's hardware devices and present this information in a tree-like hierarchy. This information can then be used to build a more efficient kernel that only contains support for devices that are actually present. It can also be used to disable probes for absent devices, thus speeding up the boot process.
The NetBSD Ppbus Project aims to remedy some of the shortcomings of the current printer driver by porting to NetBSD a more modern implementation of parallel port support in FreeBSD called ppbus. It allows faster modes of operation, IEEE 1284 support, and a generic abstract layer that multiple devices such as printer, PLIP (parallel port Internet protocol, similar to SLIP), and Zip drives. It allows bidirectional communication and an abstract parallel port interface that devices can attach to: the many chipset implementations of the parallel port will only have to provide this common interface.