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This plugin adds a small Button for Bitcoin donations below every post on your blog.
Simply install, change some settings and you’re ready to receive Bitcoins for your blog posts.
The QR-code is generated by google.com, as this is considered the safest option. 
The popover needs Bootstrap CSS (and jQuery) to work correctly.
Donations are made directly to your wallet, so no 3rd-party or Exchange is involved.
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Bitcoin Donate Button

Enables you to add a small Button for Bitcoin donations below every post on your blog. No exchange or 3rd-party needed.

Bouzid Nazim Zitouni

WordPress Exit Box kicks-in when a visitor clicks an external link on your website, instead of just following the link and losing the visitor, your Exit Box is displayed in a jQuery Box. The content of your exit box is fully customizable, and you can design it to meet your goals.
<h3>Why Should you use WordPress Exit Box?</h3>
<li>
 Monetize outgoing links 
 : Your Exit Box is a great spot to show ads, make special offers, or promote a high converting product.
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<li>
 Get more social bookmarks 
 :Place your social bookmarking buttons on your exit page.
 </li>
<li>
 Protect your SEO score 
 : No more SEO leaks from direct external links. Exit Box will stop these with nofollow links.
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<li>
 Display disclaimer messages 
 : Warn your visitors that they?re about to leave your website, and offer them to chance to go back, or select another destination.
 </li>

A premium version of Exit Box is also available, it will bring you many great features like the option to select from 3 jQuery Boxes, Social sharing shortcodes, a javascript count down timer, and much much more. <a href="http://codecanyon.net/item/wordpress-exit-box/2291033?ref=angrybyte" rel="nofollow ugc"> More details here!</a>

WordPress Exit Box Lite

A jQuery page that appears with a user clicks and external link! use it to show messages, ads, or social buttons.

Bitcoin Donate Button vs WordPress Exit Box Lite