[TYPO3-mvc] Rating/comments for my extension

[Stig Nørgaard Færch]

Hello

I'm creating an Extbase extension, where I need a rating/comments 
feature. So my question is if there is an existing Extbase extension for 
this, which can extend on my extension? Or would the best approach be to 
do it from scratch?

I need to be able to sort and filter on the domain object based ratings.

Best regards
Stig