Super-fast, easy to use and free, the Ubuntu operating system powers millions of desktops, netbooks and servers around the world. Ubuntu does everything you need it to. It'll work with your existing PC files, printers, cameras and MP3 players. And it comes with thousands of free apps. An operating system is what makes your computer work, running all your programs and managing your hardware. Other examples include Microsoft Windows and Mac OS X. With Ubuntu, you can do all the things you can do with other operating systems. But with Ubuntu you can do them faster, more securely and, of course, for free.

 

FreeBSD is an advanced operating system for modern server, desktop, and embedded computer platforms. FreeBSD's code base has undergone over thirty years of continuous development, improvement, and optimization. It is developed and maintained by a large team of individuals. FreeBSD provides advanced networking, impressive security features, and world class performance and is used by some of the world's busiest web sites and most pervasive embedded networking and storage devices…

Fedora is a Linux-based operating system, a suite of software that makes your computer run. You can use the Fedora operating system to replace or to run alongside of other operating systems such as Microsoft Windows or Mac OS X™. The Fedora operating system is 100% free of cost for you to enjoy . . .

Red Hat, the world's leading open source and Linux  provider, is headquartered in Raleigh, NC, with satellite offices worldwide. Red Hat is leading Linux and open source solutions into the mainstream by making high-quality, low-cost technology accessible.