I know that this question has been asked already some times, but I'm not satisfied (as well as others) with the given answers so far.
I'm looking for a wordpress plugin that provides a sloild and easy-to-use functionality, that allocates certain pages to specific users. The best solution would be a new box on the editing page, where the admin can simply activate the users, which should be able to edit the current page. It's important that if you allocate a page to a user, which is not able to edit pages by default, that he/she gets the page menu item on the left where they can see all pages, they are able to edit.
Any ideas if there is a plugin that provides that functionality?