Arch Linux, often called 'Arch', is an independent Linux distribution. "Lightweight and flexible," it targets "competent users," power-users, and developers. The project doesn't prefer any desktop environment, with this strategy extending to other programs and software, requiring self-configuration. In other words, Arch doesn't have many defaults. It ships a home-grown package manager, known as the pacman system. There's lots of software to choose from. Arch is designed for those who want to hack and tweak their way through issues and try to find the "right" fit.