Programs: package managers

Package managers let you install programs from the commandline.

Linux

binary packages

pacman	archlinux
nix	linux/macos package manager/environment builder
apt	debian/derivatives
yum	centos
zypper	opensuse

source based

nix	linux/macos package manager/environment builder
Arch ABS	archlinux ports tree
Arch AUR	archlinux community ports-tree

BSD

binary packages

pkgng	freebsd
pkg_add	openbsd, old freebsd

source based

freebsd-ports	freebsd ports tree
portmaster	freebsd ports tree manager (updates, etc)
poudriere	host your own freebsd ports-tree based binary package repo

win32

boxstarter	wrapper around chocolatey, that includes windows-system configuration layer
chocolatey	windows package manager
oneget	Builtin Windows Package Manager (windows 10)

macos

brew

macports