The most simple way of controlling who sees what in your posts/pages. Restrict content to logged in users only (or guests) with a simple shortcode.
Hide/Unhide Menu for Guest/Member is a simple plugin that you can easily manage to hide or unhide menu for guest and member via css.
File Proxy lest you protect / restrict access to a specific embedded file making sure users are logged in before they can download any files.
Allows you to close your site to non-logged in users, by redirecting them to the login page, displaying a message or a specific template file.
Private Files makes sure only logged in users can see images and file attachments.