Is Vbulletin a open source code. I recall WET1 telling me that porfiry himself coded much of vbulletin. I am wondering if it is a open source or a privately owned software. I have seen many forums that use it and look similar in appreance of the layout to this site.

So it is a open source??:confused:

www.vbulletin.com
The source code is available to anyone who purchases it, but it is not open source.