CygnusH33L

Plugin for restricting posts from public view that are posted in a category called ‘private’, Does this by requiring the user to be logged in to view.
To use just create a category called ‘private’ then any posts posted into this category will be hidden from public view (not logged in users).

Post Restrictor

Brandon

This plugin is now deprecated, please use WordPress Access Control for access to new features, such as restrict to members or non-members, restrict to certain roles and specify a redirect URL. This name didn’t suite the version 2.0.
https://wordpress.org/extend/plugins/wordpress-access-control/
This plugin allows you to mark a page as “Members Only”. Once this is done, the user must login to view the page. However, you can still add the page to the menu, and it will then ONLY show up if the user is authenticated. That way you can have more items for logged in members on your website.
This plugin is designed for people using WordPress as a CMS. It’s extremely easy to use. You install the plugin, and activate it. Whenever you create or edit a page there is a checkbox on the sidebar that allows you to mark that page as members only.
This plugin now fully supports wp_nav_menu and wp_page_menu for older sites, so it should be compatible with older versions of WordPress, as well as wp_list_pages for certain themes.
It automatically sets the walker class to the one we custom made so theme developers don’t need to do anything

Members Only Menu Plugin

This plugin allows you to mark a page as "Members Only" and still add it to menus (Only visible if logged in)

Post Restrictor vs Members Only Menu Plugin