Marc Queralt i Bassa

Neha Tehreem

Arnau Català

This plugin manages and shows your promotions based on its own custom post-type. 
Thanks to noel tock for his inspiring post in http://www.noeltock.com/web-design/wordpress/custom-post-types-events-pt1/

DeMomentSomTres Promotions

This plugin manages and shows your promotions based on its own custom post-type.

Sam Brodie

PromoSimple

A simple plugin that allows you to quickly add your <a href="http://promosimple.com" rel="nofollow ugc">PromoSimple</a> promotions to your WordPress site.
Create and customize all of your giveaways and sweepstakes within your PromoSimple account, including setting entry options such as ‘Liking’ a Facebook page or ‘Following’ you on Instagram, Pinterest or Twitter. When your giveaway is ready to go live, just add the campaign’s ID to the content of any page or post on your WordPress website using the PS button in the content editor. A shortcode will appear within the content editor and, once the page or post is published, your entry form will display within your content.

Giveaways and Contests by PromoSimple

Include your PromoSimple entry forms within the content of any Page or Post by entering the giveaway's ID. No JavaScript or HTML required.

DeMomentSomTres Promotions vs Giveaways and Contests by PromoSimple