Venugopal

This plugin restricted the seleted menu so anonymous user won’t access this menu item links directly
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Menu Restrict for Anonymous users

This plugin restricted the seleted menu so anonymous user won't access this menu item links directly

Nagmay

Let anonymous users preview a post before it is published!
Have you ever been writing a post that needs to be reviewed by someone who does not have access to log in? This plugin generates a simple URL that can be given out for public preview.
Based on Public Post Preview 1.3 by Matt Martz and Jonathan Dingman. Unlike Public Post Preview, the Simple Preview can be accessed by more then one user. The 24hr time limit has also been removed.
<h3>Upgrading</h3>
<ol>
<li>Click update from the WordPress plugin menu.</li>
</ol>
or
<ol>
<li>
Click ‘Download’ on this page.
</li>
<li>
Deactivate the simple preview plugin through the Plugins menu in WordPress Admin.
</li>
<li>
Upload the folder to your /wp-content/plugins directory, overwriting the previous version.
</li>
</ol>

Simple Preview

Let anonymous users preview a post before it is published!

Menu Restrict for Anonymous users vs Simple Preview