wp-thinktag

A simple, secure and effortless way to host giveaways on your WordPress blog or website and download your email list.
Prerequisites
<ul>
<li>You are a blogger</li>
<li>Free signup to the http://thinktag.co.uk blogger console</li>
</ul>
Features
<ul>
<li>Create your giveaway in 5 mins</li>
<li>Automated winner selection</li>
<li>Secure access to console to download participant and winners</li>
</ul>
<a href="http://thinktag.co.uk/static/wordpress.html" rel="nofollow ugc">See how it works</a>
<h3>Arbitrary section</h3>
You need to signup for free to the thinktag console https://thinktag.co.uk/secure/signup.html
<h3>Documentation</h3>
You tube video 
https://www.youtube.com/watch?v=xDB-k1l04kA

Thinktag Giveaway

An Easy and secure way to host giveaways on your WordPress blog or website. The plugin requires free signup to the thinktag.co.uk console.

woobox

Embedding your Woobox promotions on your WordPress site has never been easier! This plugin allows quick and easy installation of your promotion with the use of shortcode [woobox] for embedding on WordPress.
Woobox helps you easily create powerful contests, sweepstakes, coupons, quizzes and more to grow your audience and amplify your marketing.
You could embed promotions on WordPress before, but the process was complicated and didn’t work for all types of users on WordPress. We wanted to simplify the process, so we created the Woobox plugin and made it available for all our faithful WordPress users. You create a promotion on Woobox, grab the WordPress shortcode and with the plugin installed on your WordPress site, just paste it into any post or page on WordPress and that’s it.
Don’t have a Woobox account? No problem! Join the 4 million brands that use Woobox by going to <a href="http://www.woobox.com" rel="nofollow ugc">www.Woobox.com</a> and create your free account today!

Woobox

Nice not having to leave the visual editor to add Woobox offers to a page. Workes great



Shortcode much easier than embed code.

Easily embed your Woobox promotions in WordPress using a simple shortcode.

Thinktag Giveaway vs Woobox