curlybracket

This WordPress plugin restricts non-authenticated users to a number of pages to view. You can define how many pages an unauthenticated user may view. If the limit is reached, the user is redirected to the WordPress login page (default) or a page of your choice.
This plugin uses cookies, but not only. People can not just empty their cookies and start watching your page again. In this plugin i use a technique in which I combine a users’ IP address with the user agent of this particular user, and create a more or less unique hash out of these two informations. This hash is stored as a file in the wp-content/uploads directory.
A site administrator can choose to reinitialize all sessions and empty the hash files.
Furthermore, robots might be blocked. However, important bots like GoogleBot, BingBot and YahooBot are excluded from the restriction.
This technique might be problematic for users using Tor / TorBrowserBundle as lots of people share a same originating IP address and also the same user agent (check here https://panopticlick.eff.org/). I will certainly test this aspect a little better in a later version of this plugin.

Pageview content restriction

Restricts access to your Wordpress site after a certain number of pageviews.

Leo Baiano

This WordPress plugin allows you to restrict access to the content of a page or post to which only certain group of users can access.
Este plugin WordPress permite restringir o acesso ao conteúdo de uma página ou post para que apenas determinado grupo de usuários possa acessar.
<h4>Contribute</h4>
You can contribute to the source code in our [https://github.com/leobaiano/Restrict-Page-By-Role) page.

Restrict Page By Role

Great

This WordPress plugin allows you to restrict access to the content of a page or post to which only certain group of users can access.

Pageview content restriction vs Restrict Page By Role