NetBSD 3.1

NetBSD is a free, secure, and highly portable Unix-like Open Source operating system available for many platforms, from 64-bit Opteron machines and desktop systems to handheld and embedded devices. Its clean design and advanced features make it excellent in both production and research environments, and it is user-supported with complete source. Many applications are easily available through The NetBSD Packages Collection.NetBSD is a highly integrated system. In addition to its highly portable, high performance kernel, NetBSD features a complete set of user utilities, compilers for several languages, the X Window System, firewall software and numerous other tools, all accompanied by full source code. The NetBSD Packages Collection, pkgsrc, contains over 5,700 packages. Binary package releases for a number of platforms are currently in progress.The NetBSD operating system is a full-featured, open source, UNIX-like operating system descended from the Berkeley Networking Release 2 (Net/2), 4.4BSD-Lite, and 4.4BSD-Lite2. NetBSD 3.0 runs on 57 different system architectures featuring 17 machine architectures across 17 distinct CPU families, and is being ported to more. The NetBSD 3.0 release contains complete binary releases for 53 different machine types, with the platforms amigappc, bebox, pc532 and playstation2 released in source form only.
Download here