shawfactor

LH Fresh Content is the best plugin for requesting browsers to refresh their page. Perfect for single-page applications or pages that bring in feeds.
This plugins checks (in the backround) if the current page is out of date. If the current page is active the user is sent a message alerting them the page is out of date and givig them the option to refresh the page.
If the page is in the background the page is refreshed automatically.
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LH Fresh Content

LH Fresh Content checks if the page visitted is stale (or has been updated) and updates it in the background or alerts the visitor.

Abolfazl Sabagh

rng-refresh Plugin adds the meta box in edit post screen of the admin panel also you can add time period with template <code>Hour:Minutes:Seconds</code> of force refresh using it.
Main features in rng-ajaxlike include:
<ul>
<li>Very light and easy to use.</li>
<li>This plugin avoids from any conflict with other plugins.</li>
<li>has not any overhead.</li>
<li>Has a settings in order to determine post types that can have refresh meta box.</li>
</ul>
it is strongly was recommended that after the plugin is activated, go to the <code>Settings > Refresh Settings</code> and configure plugin.

rng-refresh

WordPress Plugin that refreshes the single template of public post types with a synchronism time period.

LH Fresh Content vs rng-refresh