The MailChimp plugin allows you to quickly and easily add a signup form for your MailChimp list.
Adds a WordPress widget that allows your users to sign up for your MailChimp mailing list.
Easily add an email signup button to your Tumblr pages
Sync your WordPress user user data with your MailChimp mailing list. Create campaigns from blog posts.
Integrate forum registration with MailChimp list subscription
API integration, list synchronization, subscription forms, campaign creation, and sending site emails via Mandrill.
joomlamailer is a full API integration for Joomla 1.5 & 1.6. Manage almost all aspects of your MailChimp campaigns.
Chimp Your Joomla! is a plugin that automatically adds users to your account during registration.
Sign your WordPress visitors up for multiple MailChimp lists.
Seamlessly integrates the WordPress Registration and Comment forms with MailChimp
Squarespace 6 forms integrate easily with MailChimp lists.
Easily create a custom Coming Soon Page in minutes that will help your Website Launch become a Success.
Email Marketing Framework supports multiple lists and synchronization.
wpMandrill sends emails that are generated by WordPress through Mandrill, a transactional email engine from MailChimp.
WP MailChimp Plugin allow to create unlimited subscription forms using easy wizard.
Integrate most powerful Bulletin Board (vBulletin) with Mailchimp
CMC is a Joomla extension that integrates with the MailChimp API.
Easily add a MailChimp subscription option to your ExpressionEngine site.
Create MailChimp campaigns with wordpress plugin.
Create Joomla! newsletter forms using the RSform!Pro - MailChimp Plugin.
The YIKES, Inc. MailChimp extender allows you to easily add a MailChimp signup form to a page or post.
Plugin for WordPress to allow commenters to subscribe to MailChimp lists.
MailChimp subscribe boxes... Quickly. Create and publish a MailChimp subscribe box in 60 seconds using QuickChimp!
Easily send form submissions gathered on your landing pages directly to MailChimp.
Add Vitrue's MailChimp module and have Facebook fans sign up for your newsletter in seconds.