SHARPENS YOU UP

sl.md

MacOSX

$ brew install sl

or

$ sudo port install sl

Ubuntu

$ sudo apt-get install sl

Debian

$ sudo aptitude install sl

Arch Linux

$ wget https://aur.archlinux.org/packages/sl/sl/sl.tar.gz
$ tar zxvf sl.tar.gz && cd sl
$ makepkg -s
$ sudo pacman -U sl-[version].pkg.tar.xz

Windows

Windows...?? I don't know such OS.