Linux Distributions Bird's Eye View - a Mind Map
There are umpteen GNU/Linux distributions and then some more. Many claim their roots in Debian and others in Red Hat. Still others swear that they are unique and were created from grounds up. Wouldn't it be nice if we had a picture which gave a broad idea of the roots of each GNU/Linux distributions? Well look no further.
Here is a mind map of almost all GNU/Linux distributions (atleast the mainstream ones). Though there is a good chance that I could have missed some. The picture below shows the relations between different GNU/Linux distributions.