Linked by Thom Holwerda on Fri 25th Aug 2006 20:37 UTC, submitted by Ancestor
"Sysjail is a userland virtualisation system for OSs supporting the systrace library. It runs on OpenBSD, NetBSD and MirOS. The first generation of sysjail is as close to a drop-in replacement for FreeBSD's jail subsystem as reasonably possible. While sysjail currently behaves as a NetBSD/OpenBSD/MirOS implementation of jail, it also provides additonal auditing and resource-limiting utilities."