Shea Bunge

This plugin changes the default ‘Thank you for creating with WordPress’ in your footer area to a more personal ‘Thank you for visiting My Site’ on all admin pages except the Network Admin. There is no configuration; simply install and activate.
Visit the <a href="https://sheabunge.com/plugins/personal-admin-footer/" rel="nofollow ugc">plugin homepage</a>, or contribute to its development at <a href="https://github.com/sheabunge/personal-admin-footer/" rel="nofollow ugc">GitHub</a>.
Spanish translation provided by Andrew Kurtis from <a href="http://www.webhostinghub.com/" rel="nofollow ugc">WebHostingHub</a>. 
Serbian translation provided by <a href="http://firstsiteguide.com" rel="nofollow ugc">Ogi Djuraskovic from FirstSiteGuide.com</a>.

Personal Admin Footer

Welcome users to your dashboard with a personal 'Thank you for visiting My Site' in the footer

Silkalns

WP Chill

Remove or replace footer credits (or any text or HTML in page) before page is rendered. With this plugin there is no need to modify code such as footer.php which if done incorrectly can cause your site to break or new theme updates will stomp over your changes requiring you to remove footer credits on each update.
This plugin has very minimal options to keep things simple and easier to use. You enter the text or HTML that you would like to find in one text box and the text or HTML that you would like to replace in another text box (or nothing to remove). Go <a href="https://cpothemes.com/remove-powered-by-wordpress/" rel="nofollow ugc">here</a> to view my step by step tutorial with screenshots and video.

Remove Footer Credit

It seems to work, but not as intuitive as it should be. You need to copy the code that makes up the footer porting you wish to move and paste that into the box. Wish there as a way to simply way to remove it.

Seems to Do Nothing

Remove or change footer credits or any text or HTML without modifying code.

Personal Admin Footer vs Remove Footer Credit