Mahfuzar Rahman

The MailChimp plugin allows you to quickly and easily add a signup form for your MailChimp list as a widget on your WordPress 2.8 or higher site.
Not sure what <a href="http://www.mailchimp.com/features/full_list/" rel="nofollow ugc">MailChimp</a> is or if it will be helpful? Signup up for a <a href="http://www.mailchimp.com/signup/" rel="nofollow ugc">FREE Trial Account</a> and see for yourself!
After Installation, the setup page will guide you through entering API information, selecting your List and then add the Widget to your site. The time from starting installation to have the form on your site should be less than 5 minutes – absolutely everything can be done via the WordPress Setting GUI – no file editing at all!
<h3>Developer Mode</h3>
You can enable “Devleoper Mode” by adding the following line to your <code>wp-config.php</code> file just above the “That’s all, stope editing!” line.
<pre><code>define('MAILCHIMP_DEV_MODE', true);
</code></pre>
This will enable the MailChimp List Subscribe plugin to operate without the need to connect an external MailChimp Account, and will provide a 
subscription form widget that will not actually submit anywhere.
This will allow you to style and configure the widget in non-production environments that are not publicly accessible.
For more Developer Mode customization options see the following article:
http://connect.mailchimp.com/how-to/how-to-article-configuring-developer-mode-for-the-list-subscribe-wordpress-plugin

Easy Mailchimp Optin Form

The MailChimp plugin allows you to quickly and easily add a signup form for your MailChimp list as a widget on your WordPress 2.8 or higher site.

Fetch Designs

Sign-up Sheets helps you organize sign-ups, events, shifts, and other scheduled tasks directly in WordPress. It offers a flexible way to coordinate people, time slots, and responsibilities without relying on a third-party service.
The free version of Sign-up Sheets includes core tools for building and managing sign-up sheets on your site:
<ul>
<li>Add, edit, and clear sign-up spots as needed</li>
<li>Copy a sheet or task to speed up setup</li>
<li>Send confirmation emails after sign-up</li>
<li>Let logged-in users view all of their sign-ups on one page with the <a href="https://www.fetchdesigns.com/doc/user_sign_ups-shortcode/" rel="nofollow ugc"><code>[user_sign_ups]</code> shortcode</a></li>
<li>Create an unlimited number of sign-up sheets and spots</li>
<li>Enable optional reCAPTCHA protection</li>
<li>Export sign-up data for one sheet or all sheets to CSV</li>
<li>Support WordPress <a href="https://www.fetchdesigns.com/doc/gdpr-sign-up-sheets-wordpress-plugin/" rel="nofollow ugc">GDPR privacy features for your sign-up sheets</a></li>
<li>Built with accessibility in mind based on <a href="https://www.w3.org/WAI/standards-guidelines/" rel="nofollow ugc">WCAG Guidelines</a>. If you run into any accessibility issues, <a href="https://www.fetchdesigns.com/contact" rel="nofollow ugc">please report them</a> to help make the plugin more inclusive for all users.</li>
<li>See the <a href="https://www.fetchdesigns.com/sign-up-sheets-wordpress-plugin/" rel="nofollow ugc">full list of Sign-up Sheets features</a></li>
</ul>
The Pro version of Sign-up Sheets adds advanced tools for more complex scheduling and form needs:
<ul>
<li>Create <a href="https://www.fetchdesigns.com/doc/custom-fields/" rel="nofollow ugc">custom task fields and custom sign-up form fields</a></li>
<li>Send optional reminder emails before an event</li>
<li>Customize confirmation and reminder emails per sheet</li>
<li>Assign <a href="https://www.fetchdesigns.com/doc/sheet-categories/" rel="nofollow ugc">categories to sign-up sheets</a> and display current sheets for a specific category</li>
<li>Let logged-in users edit their own sign-ups</li>
<li>Enable Spot Locking to hold a spot for 3 minutes while a user completes the sign-up form</li>
<li>Use <a href="https://www.fetchdesigns.com/doc/compact-semi-compact-standard-display-modes/" rel="nofollow ugc">Compact and Semi-Compact display modes</a> to condense tasks with many spots into a single line</li>
<li>Set sign-up limits per task</li>
<li>See the <a href="https://www.fetchdesigns.com/sign-up-sheets-wordpress-plugin/" rel="nofollow ugc">full list of Sign-up Sheets features</a></li>
</ul>
Sign-up Sheets is used for church and nonprofit volunteer opportunities, school and PTO/PTA events, club sign-ups, meeting room reservations, photographer time slots, peronal gatherings, and more. It is a practical alternative to monthly paid services like SignUpGenius while keeping your sign-ups on your own WordPress site.

Sign-up Sheets

Create online sign-up sheets for volunteers, events, and group scheduling.

Easy Mailchimp Optin Form vs Sign-up Sheets