This plugin allows you to change the footer text on the bottom left of the admin page. Once activated, navigate to the Settings -> nuAdmin Footer and change the Footer text/HTML. You can use html to link to your website, your help desk, your email or anything you would like. If you find the plugin to be useful and would like to donate, you can do so in the Settings. Here’s a link to the blog post on this topic for more information. Future version’s will have much more capabilities.