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.

mpvanwinkle77

NEW FEATURES 
The Plus version of this plugin is now free! It includes reCAPTCHA, Facebook Connect, Custom Field UI, Moderation, Custom Confirmation messages. More info at http://mikevanwinkle.com/simplr-registration-form-plus/
This plugin creates a user interface for adding custom registration forms to any post or page on your WordPress website. Simply navigate to the edit page for post or page on which you would like the form to appear and click the registration forms button. A popup menu will appear guiding you through the options.
The plugin also creates an interface for adding/removing fields to be used in the registration form.

Simplr Registration Form Plus+

Easy to include new fields and custom registration forms.
Amazing Plugin.



Great Plugin

Nice plugin, this is working nice after customizing some files as my requirements.



Nice Plugin, Thanks!

The plugin uses a old form or reCAPTCHA that is no longer supported. Web links to developer are dead. There is not a lot of documentation on the shortcodes. The app has potential but needs to be improved.

Plugin not maintained

This plugin allows users to easily add a custom user registration form anywhere on their site using simple shortcode.

Easy Mailchimp Optin Form vs Simplr Registration Form Plus+