Floating Comments allows users to post comments to your blog through a fancy form that fallows them as they scroll down.
This lightweight plugin creates a form that is placed by default at the left of the content, and is fixed to the top of the page once it gets to it.
Floatin Comments serves as an alternative form to post comments that is very handy compared to the traditional comments form. Given that it follows you as you scroll down by the page, you can post a comment being at the bottom of the page but also at the top.
This plugin is available in 5 different languages, English, Spanish, Portuguese, French and Dutch, it will recognize your WordPress installation language and if yours is in one of the previews languages you'll have it automatically translated.