Popular Linux Distributions

1. Debian (3)
2. Gentoo (3)
3. Kubuntu (1)
4. Lindows (3)
5. Lycoris (3)
6. Mandriva (3)
7. Red Hat (3)
8. Slackware (3)
9. SuSE (3)
10. Ubuntu (399)
11. Xandros (3)
12. Xubuntu (86)

Mac OS X is not a Linux Distribution, But ...
Common roots and similarities between the operating systems Mac OS X and Linux