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

Otto Kekäläinen

Viljami Kuosmanen

This plugin is useful if you have want to enable your users to insert custom CSS or add custom headers or some JavaScript into the site without having to edit any theme files. Unlike similar header/footer plugins, this plugin by design does not allow to insert PHP code and does not contain any evil eval() calls.
The plugin is safe to use in WordPress Network installations, where site admins are not supposed to have PHP execution access but any HTML/CSS/JS code is safe to accept.
Simple Header Footer HTML is made by Seravo.com. Seravo provides Premium Hosting and Upkeep service for WordPress.
Contributing
Source available at https://github.com/Seravo/wp-simple-header-footer-html

Simple Header Footer HTML

A simple plugin for injecting HTML into various places in your WordPress theme output.

Personal Admin Footer vs Simple Header Footer HTML