Joomla Article Answers with attachments

I have a page with a list of articles of a given category, what I'm trying to do is to give the possibility to "answer" an ar开发者_运维知识库ticle ("comment" if you prefer) but this answer needs to be a text + attached doc.

My question is :

What Plugin/component/solution comes to your mind?

I'm trying to figure out if there's any existing plugin that can handle this.

Right now, I'm looking into the comments extension list.

There are a few Q&A options for Joomla that I know of:

jAnswers - is a commercial plugin that clones Yahoo answers.

IknAnswers - another Yahoo clone and again its commercial.

Its a bit disappointing there don't seem to be any free Q&A solutions out there for Joomla that I've found.

If you are willing to just accept comments then JComments is one of the most popular. I don't think you can attach documents with JComments though.