Raspbian is a Debian-based distribution optimized for the Raspberry Pi hardware. Raspbian provides more than a pure OS: it comes with over 35,000 packages, pre-compiled software bundled in a nice format for easy installation on your Raspberry Pi. Raspbian joined the list July 23, 2012. Debian "Jessie" based Raspbian 2017-06-21 is out. Raspbian "Stretch" was released August 17, 2017. Raspbian 2018-06-27 is out.