Meitar

My Two Cents integrates your WordPress-powered site or blog’s commenting features with BitCoin.
My Two Cents is extremely lightweight, completely automated, and extremely unobtrusive. Simply provide your BitCoin address(es) and the plugin takes care of the rest. For best anti-spam results, I recommend enabling WordPress’s built-in “Comment must be manually approved” option in its <a href="https://codex.wordpress.org/Settings_Discussion_Screen" rel="nofollow ugc">Discussion Settings</a>.
By default, My Two Cents automatically generates a unique BitCoin address for each comment. This feature relies on the “low-trust” <a href="https://blockchain.info/api/api_receive" rel="nofollow ugc">BlockChain.info Receive Payments API</a>. Your commenters send BTC to the automatically generated addresses, and BlockChain.info forwards the amount to the address that you choose.
Optionally, you can also use the simpler “transaction polling” method. This will add a field to your comment form asking for the commenter’s BitCoin address. Once each hour, My Two Cents queries the BitCoin blockchain (the public accounting ledger of transactions) and searches for funds transfers to your address from the commenter’s address.
When a valid transaction is detected, My Two Cents acts on the associated comment(s). 
Maintaining this plugin is a labor of love. However, if you like it, please consider <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=meitarm%40gmail%2ecom&lc=US&item_name=BitCoin%20Comments%20WordPress%20Plugin&item_number=bitcoin%2dcomments&currency_code=USD&bn=PP%2dDonationsBF%3abtn_donateCC_LG%2egif%3aNonHosted" rel="nofollow ugc">making a donation</a> for your use of the plugin, <a href="http://www.amazon.com/gp/redirect.html?ie=UTF8&location=http%3A%2F%2Fwww.amazon.com%2Fs%3Fie%3DUTF8%26redirect%3Dtrue%26sort%3Drelevancerank%26search-type%3Dss%26index%3Dbooks%26ref%3Dntt%255Fathr%255Fdp%255Fsr%255F2%26field-author%3DMeitar%2520Moscovitz&tag=maymaydotnet-20&linkCode=ur2&camp=1789&creative=390957" rel="nofollow ugc">purchasing one of Meitar’s web development books</a> or, better yet, contributing directly to <a href="http://Cyberbusking.org/" rel="nofollow ugc">Meitar’s Cyberbusking fund</a>. (Publishing royalties ain’t exactly the lucrative income it used to be, y’know?) Your support is appreciated!

My Two Cents

Get BitCoin from commenters. Auto-approve comments that include a BitCoin donation. Fight spam with BitCoin microtransactions.

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.
 </li>
<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.
 </li>
<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.

My Two Cents vs WordPress Exit Box Lite