Pacman (package Manager)
Pacman is a software package manager, developed as part of the Arch Linux distribution. It was created by Arch Linux creator Judd Vinet. The pacman package manager is one of the major pillars of Arch Linux.
In addition to Arch Linux, pacman is also used by Chakra Linux, Destro, Manjaro and DeLi Linux. Frugalware uses a fork of a pacman rewrite.
Read more about Pacman (package Manager): Usage, Packages and Build System, Libalpm, Graphical Front-ends