Nord

This is a simple plugin that allows visitors to enter their name and email address on your website, the visitors details are then added to the subscribers list which is available to view and modify in the WordPress admin area.
This plugin can be used not only for Mailing List subscriptions but can be used generally for collecting email address and/or peoples names that are visiting your website.
The name/email form can not only be customised but can also be displayed on any WordPress page by using either the ‘Subscribe Widget’

Nord Sub News

Simple customizable plugin that displays a name/email form where visitors can submit their information, manageable in the WordPress admin.

Nord Sub News vs MC4WP: Mailchimp for WordPress