leftofcentre

www.mysitesmanager.com is the easy way to manage multiple WordPress sites. We take the headache out of managing lots of sites by giving you a simple dashboard that lists your sites and any updates that are available. Built for security, we do not store any login data. We do not store your login details or any other passwords or sensitive data. The way the system works is you add our plugin to your site. The plugin creates an xml file that lists any out of date app versions, plugins or themes. Our system reads this xml file and displays the data on your dashboard.
How does the plugin work? 
The plugin will run a daily cron job to check for updates and then write the details to the xml file. We then read this xml file from our system and write the data to your dashboard.
The plugin is not standalone you need a free account with www.mysitesmanager.com to use it.
The plugin is based on code from the WP Updates Notifier plugin (https://wordpress.org/plugins/wp-updates-notifier/) by Scott Cariss but we have substantially modified the code.
Features
<ul>
<li>Runs a daily check for updates to plugins, themes and WordPress. Then writes the details to an xml file.</li>
</ul>

MySitesManager Updates Checker

www.mysitesmanager.com is the easy way to manage multiple WordPress sites. We take the headache out of managing lots of sites by giving you a simple d …

Scott Reilly

This plugin removes the WordPress update nag that appears at the top of all admin pages when a new version of WordPress is released.
Tired of WordPress nagging you about a new release? Maybe you already know about it and want to hold off on an update and would rather not see the update nag on every admin page you visit. Activate this plugin and be bothered no more!
The status of your version of WordPress (be it current or out-of-date) is still reflected in the footer of your admin pages and in the update count link in the admin bar.
And certainly, of course, I don’t advocate completely ignoring the fact that updates often contain fixes for critical bugs or exploits. However, there are various other means of learning about updates; and once known, not everyone is able or willing to update immediately.
Links: <a href="https://coffee2code.com/wp-plugins/no-update-nag" rel="nofollow ugc">Plugin Homepage</a> | <a href="https://wordpress.org/plugins/no-update-nag/" rel="ugc">Plugin Directory Page</a> | <a href="https://github.com/coffee2code/no-update-nag/" rel="nofollow ugc">GitHub</a> | <a href="https://coffee2code.com" rel="nofollow ugc">Author Homepage</a>

No Update Nag

does what it says on the tin

Removes the WordPress update nag that appears at the top of all admin pages when a new version of WordPress is released.

MySitesManager Updates Checker vs No Update Nag