Marco

Shortcode Simplex it’s a lightweight Shortcode plugin creator, permit all WP Admins to define new shortcode ( single or enclosed one ) to any kind of purpose. With it’s minimal human readable and 
intuitive interface you can create and manage all your Shortcode.

Shortcode Simplex

This lightweight plugin permit to create and manage easily user define Shortcode inside Wordpress.

Peter Wooster

This plugin allows editors to request a promo code and optional email address from users to get access to a document and track its usage.
Features for Editors
<ul>
<li>a short code [promo] is provided that will display a form that requests a 
promo code and optionally an email address from your users and then takes them to a url.</li>
<li>a summary of the accesses using this code is displayed to editors by the short code</li>
<li>editors can clear the logging from the short code</li>
<li>there is no back end admin page </li>
</ul>
Short Code Arguments are:
<ul>
<li>code= a string that must be entered access the document, required</li>
<li>document= a url to the document that you want to track, required</li>
<li>name= the name to display for the document, required</li>
<li>email= ‘yes’ to request the user’s email</li>
<li>id= the id on the form tag, useful for CSS, default is ‘promo’</li>
<li>promolabel= the label for the promo code input field, default is ‘Please enter promo code for name’</li>
<li>emaillabel= the label for the email input field, default is ‘Please enter your email address’</li>
<li>liststyle= the style or class for the ul, default is ‘style=”list-style:none”‘</li>
</ul>

Simple Promo Code

A very simple plugin that allows an editor to track accesses to a document by promo code.

Shortcode Simplex vs Simple Promo Code