Official Subscribe Widget

MailChimp List Subscribe Form – This option is not to flexible you can only have your widgets subscribing users to one of your lists. Get it here.

Unofficial Subscribe Widget

MailChimp Widget – Adds a widget that allows your users to sign up for your MailChimp mailing list. You can have a different list for each instance of the widget. Get it here.

MailChimp Archives

Display your Mail Chimp Email Archives on your WordPress site. Get it here.

ChimpFeedr

Enter a bunch of RSS feeds into ChimpFeedr, and we’ll mash ’em up into one master RSS feed. Then, maybe you can use that master feed for your awesome RSS-to-email campaigns! Get it here.

ChimpExpress

ChimpExpress is a plugin that lets you easily pass content between your newsletter service provider (MailChimp) and your content management system (WordPress) via the API provided by Mailchimp. The plugin fulfills three
main tasks to help you with the publishing of your content:

– import sent MailChimp campaigns as WordPress blog posts
– import campaigns as trackable landing pages
– create drafts with existing content from WordPress

Get it here and here!

RSS feeds of your MailChimp Campaigns

From the MailChimp blog:

Wanted to highlight a slightly obscure feature we released a while back, but never really discussed. When you organize your campaigns into archives in MailChimp, ourarchive toolbar has a couple handy links:

The first is to “view past issues,” which is useful, but the 2nd one is the interesting one. We actually generate an RSS feed of all your past campaigns. Your subscribers can follow your campaigns via RSS reader, but more importantly, you can use this feed to publish your archives elsewhere (like on your own website). See what else is on the MailChimp archive toolbar.