Free WordPress ToTop Link pluginFree
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. When clicked the page scrolls smoothly back to the top of the page.
You can easily customize the link’s position, style and/or text. Additionally, you can either use the included images or define your own custom image to use.
Demo: Check out the plugin’s page for a demo.
Author: Dao By Design
Source from: WordPress.org