PF (Packet Filter) is OpenBSD's system for filtering TCP/IP traffic, doing Network Address Translation, normalizing and conditioning TCP/IP traffic and providing bandwidth control and packet prioritization.
PF has also been ported to FreeBSD, NetBSD, and DragonFly BSD, and is an integral part of MirBSD.
The NetBSD Packages Collection (pkgsrc) is a framework for building third-party software on NetBSD and other Unix-like systems, currently containing over 6400 packages. It is used to enable freely available software to be configured and built easily on supported platforms.
pkgin is aimed at being an apt / yum like tool for managing pkgsrc binary packages. It relies on pkg_summary(5) for installation, removal and upgrade of packages and associated dependencies, using a remote repository.
pkgsrc-wip (work in progress) is a project to get more people actively involved with creating packages for pkgsrc, a portable packaging system coming from NetBSD. It is the default packaging system for NetBSD and DragonFly and was also ported to many additional operating systems, including Solaris
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DT PS Tree shows running processes as a tree. It is a reimplementation of pstree from PSmisc for FreeBSD, NetBSD, OpenBSD, DragonFly BSD, and possibly other modern BSD variants. It also works without /proc and will show the full set of processes in a jail even if init is not present.