With few exceptions (Puppet being one of them, because it just rocks) open source enterprise tools need to be packaged and available in one of the mainstream repositories (even EPEL is good enough! The bar isn't that high!) or your tool just isn't ready for primetime.
Looking at you Plone, LogAnalyzer, nxLog and LogStash! OSSEC gets a pass, but just barely because they are using the funky Atomic repo.
This is where tools like Zabbix and OSSIM come out ahead. The last thing you want to be doing when managing an enterprise, particularly in the industrial control space because of the funky requirements, is worrying about manually updating ANYTHING.
Really, the only reason why Puppet gets a pass is because it's so hugely useful in an enterprise.
And no, I don't want a bunch of excuses on why your tool isn't in a repository, whether it's for Debian, Ubuntu or the Red Hat side of things. If it's not available as a managed package, chances are your tool isn't going to be deployed by me or other IT people like me...and we tend to be a very stodgy group.