Joshua Parker

Integrate your <a href="https://codecanyon.net/item/tinycampaign/4755189" rel="nofollow ugc">tinyCampaign</a> mailing list and your WordPress powered site with this mailing list subscription form widget. Just enter the list code and the base url of your mailing list, and users will be subscribed to that list 
when they submit the form.
About tinyCampaign 
tinyCampaign is a simple mailing list system that allows you to send out unlimited number of campaigns to your mailing list. tinyCampaign is powered by the Liten Framework and Bootstrap. Below are just a few of tinyCampaign’s features:
<ul>
<li>Unlimited subscribers and mailing lists.</li>
<li>Send personalized and customized emails</li>
<li>Email speed throttling</li>
<li>Custom list settings</li>
<li>Custom success and error url’s</li>
<li>Automatic bounce handling</li>
<li>Regular and ajax subscriber forms to embed</li>
<li>Per campaign custom sender settings</li>
<li>Send campaigns now or later</li>
<li>Send to multiple lists at once</li>
<li>Html editor optimized for newsletter design.</li>
<li>Campaign personalization (body, subject, hyperlinks, etc.)</li>
<li>Easily upload images</li>
<li>Send html, text, or both</li>
<li>Templates manager</li>
<li>View archived campaigns via a web browser</li>
<li>Queue multiple campaigns</li>
<li>Preview campaigns</li>
<li>Send test campaign before queuing</li>
<li>Use multiple SMTP servers</li>
<li>Per user SMTP server(s)</li>
<li>Multiple user accounts</li>
<li>Per user statistics and reports</li>
<li>Per user email templates</li>
<li>Pause, resume, edit a campaign</li>
<li>Clicks/Views email campaign reports</li>
<li>Charts exportable to pdf/png</li>
<li>Email open reporting</li>
<li>Link click tracking</li>
<li>Distribution reports</li>
<li><a href="https://codecanyon.7mediaws.org/knowledge-base/track-campaign-with-google-analytics/" rel="nofollow ugc">Campaign Tracking with Google Analytics</a></li>
<li>Backend email queue</li>
<li>and much more . . .</li>
</ul>
<h3>tinyCampaign Demo</h3>
Click <a href="https://www.tcdemo.us/" rel="nofollow ugc">here</a> to check out the new and improved tinyCampaign.

WP tinyCampaign Widget

A sidebar widget which adds a newsletter subscription form to the sidebar of a WordPress site.

Bernhard Kau

To be able to use the plugin, you have to get API credentials from Mailchimp. You can find them in the <a href="https://us1.admin.mailchimp.com/account/api/" rel="nofollow ugc">API keys section</a> of your Mailchimp account. If you already use the plugin “Mailchimp” or “Mailchimp for WooCommerce”, the API key from these will automatically be used.
The plugin allows you to show all campaigns from the connected Mailchimp account. You can show up to 100 campaigns (this is a hard limit of the Mailchimp marketing API). For each campaign, you can either show the “Title” or the “Subject”. You can also show the author/sender as well as the sending date (and time).
This is not an official Mailchimp plugin. Mailchimp® is <a href="https://mailchimp.com/legal/copyright/" rel="nofollow ugc">a registered trademark</a> of The Rocket Science Group.

Campaign Archive Block for Mailchimp

Adds a block to show an archive for Mailchimp campaigns.

WP tinyCampaign Widget vs Campaign Archive Block for Mailchimp