Is there a bulletin board and social network (comment) engine in one?

Question

CMS

I'm looking for a script or CMS with bulletin board functions (eg, Avito) and the ability for users to leave comments on ads, and among themselves, and create groups (topics).
Examples that he himself found:
allrealtynn.ru
jokerboard.org/board
Maybe someone knows more alternatives?

Answer 1

Questions in the style of "I want how it is there" have a great chance of being left without an adequate answer, because few people will have the desire to go and specifically study the functionality of "something there", just to give an answer here.
Therefore, I will not answer the first part of the question, but the second - Alto CMS