Allowing visitors or users to edit a post

Suppose we want to allow visitors to edit some posts. I mean, just like Wikipedia where users can edit articles, I want to allow users to do so. I know there are some wiki-like plugins, but those are not what I am looking for. I need to give access to the visitors to edit the posts (Not necessarily in a wiki fashioned theme), and I as the admin should be able to accept or reject the edit. Is there any plugin for this?
Thanks in advance

• This topic was modified 3 years, 9 months ago by Steven Stern (sterndata).