Scientific Linux etc
I actually used White Box Linux when I needed a RHEL clone, but it was a one-man band (or nearly), so after a year or two its maintainer gave up, and recommended CentOS, to which I moved.
Scientific Linux was a bit different, it survived until fairly recently, and the reason is it was not just a RHEL clone, but bundled software that RHEL did not have (I think OpenAFS support was one notable addition).
Biting the hand that feeds IT
