Related sites:

• ubuntu.com

  The leading operating system for PCs, IoT devices, servers and the cloud | Ubuntu

  

• gnu.org

  The GNU Operating System and the Free Software Movement

  

• slax.org

  Slax Linux - your pocket operating system

  

• qnx.com

  BlackBerry QNX Home Page

  

• virtualboxes.org

  VirtualBoxes - Free VirtualBox® Images | Ready-to-use virtual machines for open-source operating systems

  

• gnu.org.ua

  The GNU Operating System

  

• hecticgeek.com

  Hectic Geek - Best Operating System Reviews (Mostly 'Linux') & App Tips