WordPress.org

A simple plugin for WordPress that adds an unobtrusive "back to top" link to your site or blog. The link uses WordPress' included jQuery to provide a slick UX, with the link subtly appearing after the page has been scrolled, and disappearing once the user returns to the top of the page. Additionally, a smooth scrolling animation is added when the link is clicked on.

You can easily customize the link's position, style and/or text. Additionally, you can either use the included arrow images or define your own custom image to use.

Demo: Check out the plugin's page for a demo.