brendannee

Keep your site’s content fresh. This plugin adds a box to the WordPress admin dashboard that lists all pages that haven’t been updated in recently. Every time you log in you’ll be able to quickly see which pages might need review to ensure the content is still correct and everything is up to date.
You can set the threshold in days for considering a page “old”, the default is 90 days.

Old Page Reminder

This plugin adds a box to the Wordpress admin dashboard that lists all pages that haven't been updated in 90 days.

Marcelo Pedra

AMPM Dashboard Admin Note adds an “Important Note” widget to the WordPress Dashboard (wp-admin → Dashboard). Only administrators (capability <code>manage_options</code>) and (in Multisite) Super Admins can view and edit it.
Features:
<ul>
<li>Visual editor (TinyMCE) inside the dashboard widget.</li>
<li>AJAX saving with feedback (“Saving…” label + spinner).</li>
<li>Strict sanitization via allowlist (wp_kses) and limited inline styles (color, background-color, text-align).</li>
<li>Links forced to <code>target="_blank"</code> with <code>rel="nofollow noopener noreferrer"</code>.</li>
<li>Widget severity/color: Neutral / Info / Warning / Error.</li>
<li>Shows: “Modified by: user_login (Display Name. ID: X) — date/time” using the site timezone configured in WordPress.</li>
<li>Multisite-friendly: stored per site (blog) by default.</li>
</ul>
<h3>Translations</h3>
<ul>
<li>English (Default)</li>
<li>Spanish (Español)</li>
<li>Argentinean Spanish (Español de Argentina)</li>
<li>Dutch (Nederlands)</li>
<li>French (Français)</li>
<li>German (Deutsch)</li>
<li>Italian (Italiano)</li>
<li>Portuguese (Português brasileiro)</li>
</ul>

AMPM Dashboard Admin Note

Displays a single admin-only Dashboard widget (“Important Note”) with TinyMCE editing and AJAX save.

Old Page Reminder vs AMPM Dashboard Admin Note