ThemeShock

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.
<a href='http://www.wpthemeshock.com/' rel="nofollow ugc">By WpThemeShock</a> and <a href='http://www.wpthemegenerator.com/' rel="nofollow ugc"> WpThemeGenerator</a>, <a href='http://www.designshock.com/psd-text-styles/' rel="nofollow ugc">see it in action.</a>
<h3>Features</h3>
<ol>
<li>4 Different Colors</li>
<li>Fixed position when the form gets to the top</li>
<li>Ajax-Powered</li>
<li>Get 100 free sample WordPress Themes</li>
<li>5 Different languages, English, Spanish, Portuguese, French and Dutch.</li>
</ol>

Floating Comments Form Fixed Scroll Position

Floating Comments allows users to post comments to your blog through a fancy form that fallows them as they scroll down.

floattechnologies

The Float plugin for WooCommerce let’s your shoppers buy today, and pay over up to 24 interest-free, monthly instalments using their existing credit card.
No interest or fees. No applications. No new debt.
Sign up at www.float.co.za today to get started.
<h3>Why choose Float?</h3>
By offering Float as a payment method to your shoppers, merchants can expect the following benefits:
<ul>
<li>Orders made through Float are, on average, more than 80% bigger than regular orders</li>
<li>Drastically increase conversion rates</li>
<li>More than 6.5m credit cards are pre-approved to work with Float instantly</li>
</ul>

Float Payment Gateway

Take credit card payments on your store using the Float API.

Floating Comments Form Fixed Scroll Position vs Float Payment Gateway