UpPrev Wordpress Plugin - Rating, Reviews, Demo & Download

Plugin Description
Display cool, animated fly-out or fade box with related content.
When a reader scrolls to the bottom of a single post, page, or custom post type, an animate box will be shown allowing the reader to select the previous or random available post or posts in the selected configuration:
- Just previous
- Previous in category
- Previous in tag
- Random
- Related using YARPP (only post/pages)
Screenshots
upPrev on post
upPrev options: appearance
upPrev options: content
upPrev options: links
upPrev options: cache