review plugin

Hello everyone,

Does anyone know a plugin that can do the following?

I like te have visitors who are registered to be able to write a review about a product. This has to be a review where they can give some points to some things like quality, price, etc. and they need to have the possibility to write some text.

But it is also important that the visitors are able to add there own products tot the databse.

I hope that someone can help me out.

Thanks a lot anyway.