Zack Katz

<blockquote>
<p><strong>This plugin requires a <a href="http://wordpress.constantcontact.com" title="Sign up for a free Constant Contact trial" rel="nofollow ugc">Constant Contact account</a>.</strong> <br /><em>Don’t have an account?</em> Constant Contact offers a <a href="https://wordpress.constantcontact.com/email-marketing/signup.jsp" rel="nofollow ugc">free 60 day trial</a>, so sign up and give this plugin a whirl!</p>
</blockquote>
<p>Automatically add contact form submissions to Constant Contact lists that you choose.</p>
<h3>Get linked with Constant Contact in 60 seconds!</h3>
<p>This plugin is very easy to get set up. The instructions are simple:</p>
<ol>
<li>Activate the plugin through the ‘Plugins’ menu in WordPress</li>
<li>Go to Contact > Constant Contact menu in the WordPress sidebar</li>
<li>Enter your Constant Contact login information</li>
<li>Configure the Constant Contact section on the Contact Form 7 “Edit” form page</li>
</ol>
<p>…and you’re done!</p>
<h3>Have multiple forms?</h3>
<p>You can configure integrations on a per-form basis. Different Contact Form 7 forms can add users to different Constant Contact lists.</p>
<h4>Features</h4>
<ul>
<li>Add contacts to multiple lists at once</li>
<li>Sync form fields to Constant Contact fields, including your Custom Fields</li>
<li>Add a newsletter opt-in checkbox to your form (see <a href="https://wordpress.org/extend/plugins/contact-form-7-newsletter/faq/" rel="ugc">plugin FAQs</a> to learn how)</li>
</ul>
<h4>This plugin requires Contact Form 7 4.3 or newer</h4>


Contact Form 7 Newsletter

Easily integrate email marketing with the Contact Form 7 plugin. When users contact you, they get added to your newsletter!

Ashton Paul

elementsweb

<p>The Simple Constant Contact Plugin is a quick and easy plugin to interface with your constant contact account. It takes the visitor’s name and email and allows it to send that information directly to your Constant Contact account. Set up is easy. Just follow the instructions in the admin menu and you’re on your way. The UI was left raw with class and id tags so you can apply your own styling to match your current theme.</p>


Simple Constant Contact

currently says this:
-------------------------
		function simpleCC_display_form() {
			// test to see if all the settings are correct
			if ($this->ready()) {
			?>
			<div class="simpleCC_plugin">
				<form class="simpleCC_form" id="simpleCC_form" method="post">
					<label for="simpleCC_fname">First Name:<input type="text" id="simpleCC_fname" name="simpleCC_fname" /></label>
					<label for="simpleCC_lname">Last Name:<input type="text" id="simpleCC_lname" name="simpleCC_lname" /></label>
					<label for="simpleCC_email">Email:<input type="email" id="simpleCC_email" name="simpleCC_email" /></label>
					<button id="simpleCC_submit" type="submit" name="simpleCC_submit" value="simpleCC_submit_successful">Submit</button>
				</form>
			</div>
			<?php
			}
		}
--------------------------------
but should say this:
-----------------------------------
		function simpleCC_display_form() {
			// test to see if all the settings are correct
			if ($this->ready()) {
return '<div class="simpleCC_plugin">
				<form class="simpleCC_form" id="simpleCC_form" method="post">
					<label for="simpleCC_fname">First Name:<input type="text" id="simpleCC_fname" name="simpleCC_fname" /></label>
					<label for="simpleCC_lname">Last Name:<input type="text" id="simpleCC_lname" name="simpleCC_lname" /></label>
					<label for="simpleCC_email">Email:<input type="email" id="simpleCC_email" name="simpleCC_email" /></label>
					<button id="simpleCC_submit" type="submit" name="simpleCC_submit" value="simpleCC_submit_successful">Submit</button>
				</form>
			</div>';
			}
		}



shortcode function is supposed to return a string

Simple Wordpress Constant Contact Plugin to take name and email and allow to send that information straight to Constant Contact

Contact Form 7 Newsletter vs Simple Constant Contact