Marco Canestrari

Plugins Genius allows you to choose which plugins should be active in the frontend and in the backend. 
Some plugins affects only the frontend, some only the backend of WordPress and some of them make WordPress slow.
Now you can tune your WordPress site, actvating plugins only where you need.
<ul>
<li>Author: <a href="http://www.marcocanestrari.it/" rel="nofollow ugc">Marco Canestrari</a></li>
</ul>

Plugins Genius

Role-based active plugins manager. Choose which plugins should be active for each WordPress role in the backend and in the frontend.

deadelvis

To complement the [is_user_logged_in] shortcode I noticed a [is_user_logged_out] shortcode was missing from <a href="https://wordpress.org/extend/plugins/members/" rel="ugc">Members plugin</a>, soI decided to write an “extension plugin” to add it. Maybe this can be added to <a href="https://wordpress.org/extend/plugins/members/" rel="ugc">Members</a> itself one day?
The [is_user_logged_out] shortcode should be used to check if a user is currently logged out of the site. If not, the content will be hidden.
Example: 
[is_user_logged_out]This content is only shown to logged-out users.[/is_user_logged_out]
This shortcode has no parameters.

Members [is_user_logged_out] shortcode

Members plugin extension to add a [is_user_logged_out] shortcode.

Plugins Genius vs Members [is_user_logged_out] shortcode