WebSight Designs

This plugin allows you to set up a custom login page, including your logo. It also allows you to set a custom footer by adding in your own text or HTML.
<ul>
<li>Allows you to specify a URL to an image you’d like to use as your WordPress Admin login page’s logo.</li>
<li>Allows you to specify your own text and/or HTML to replace the footer of the WordPress Admin with.</li>
<li>Sets the URL of your blog as the URL visited when a user clicks the logo on the WordPress Admin login page.</li>
<li>Sets the title (seen when you hover your mouse over the logo) of the logo’s link to be your blog’s name.</li>
<li>Allows you to specify the background color and the text/links color of the WordPress Admin login page.</li>
</ul>
Please take a moment and rate this plugin at: 
https://wordpress.org/support/plugin/wp-customize/reviews/

WP Customize

This plugin allows you to set up a custom login page, and set a custom footer message in the WordPress Admin.

inthiscode

Change the footer text of your WordPress’ admin dashboard with your custom text.
<ul>
<li>The WordPress’ default editor is added.</li>
</ul>
Please visit <a href="https://www.inthiscode.com/wordpress-change-custom-admin-footer-text" rel="nofollow ugc">Change Custom Admin Footer Text Demo</a>.

Change Custom Admin Footer Text

Change admin footer text with your custom text to give your clients a more personalized WordPress website.

WP Customize vs Change Custom Admin Footer Text