FACT: The Granddaddy of all “Free and Open Source” Software is Linux.
Linux is an operating system like Windows or OS X, except it is free and open source.
If you are not already initiated in the FOSS community, here is a Charlie Rose interview with Linus Torvalds, the creator of Linux… He talks about how his intent was not political, that he created the OS for fun.
https://www.youtube.com/watch?v=jJ4y6p6xdmw
Distros
Though Still in Beta, Steam OS is a Linux distro that promises to make gaming a central element of the Linux user experience.
Elementary is a newer distro that seems to be gaining a lot of attention and use.
This is the Linux distro I have grown used to. Even after years of use I still can’t decide if I love or hate the Unity UI.
For the most up to date information on Linux distros visit: http://distrowatch.com/
This post will be continually updated as a Linux resource page.