OpenBSD 4.0 (i386)

The OpenBSD project produces a FREE, multi-platform 4.4BSD-based UNIX-like operating system. OpenBSD emphasizes portability, standardization, correctness, proactive security and integrated cryptography. OpenBSD supports binary emulation of most programs from SVR4 (Solaris), FreeBSD, Linux, BSD/OS, SunOS and HP-UX.
As in previous releases, 4.0 provides significant improvements, including new features, in nearly all areas of the system. New/extended platforms: armish - various ARM-based appliances, using the Redboot boot loader, currently only supporting the Thecus N2100 and IOData HDL-G; sparc64 - UltraSPARC III based machines are now supported; zaurus - support for the Zaurus SL-C3200." Improved hardware support, many new tools, new functionality features, and assorted improvements are all part of OpenBSD 4.0