Ivaldi Mail Collector allows you to collect email addresses of users visiting your website using a widget.
Very nice and professional Opt-in form for Mailchimp list.
Integrates your WordPress site with KISSmetrics to track meaningful user data, with or without Paid Memberships Pro.
Constant Contact Signup Form is a WordPress plugin for Constant Contact emailers.
Easy form integrated with MailChimp lists. Signup tabs, form templates, analytics and tracking tools. MailChimp Form is maintained by ContactUs.com
Simple plugin to add a newsletter sign-up form to your website
The DiloBox Subscription plugin allows you to quickly and easily add a signup form for your DiloBox list as a widget on your WordPress site.
This plugin will make your blog more secure by adding rules which spambots will not pass.
Connects WordPress to Salsa for embedding events, sign up forms, and reports.
Passwordless allows users to sign up and log in using only email addresses, removing the need for them to remember yet another password.
The Aweber Form Plugin by ContactUs.com creates newsletter signup forms for Aweber users to grow their email newsletter list.
The VerticalResponse Form by ContactUs.com is a plugin to create and publish dynamic newsletter signup form experiences used by VerticalResponse subsc
The ActiveCampaign Form Plugin by ContactUs.com serves dynamic newsletter signup forms for ActiveCampaign users.
Integrate MailChimp in your WordPress site with AJAX powered customizable multiple form without touching code.
The FanBridge Signup plugin allows you to add an email signup form to your WordPress blog
Embed ReachMail subscription forms to your WordPress powered website.
Place custom content above or below every post and/or page or from a specific category.
A simple plugin to allow visitors to submit their email and name and be added to the subscribers list
This plugin is able to handle the wordpress login using the authentication of OpenERP 6.1.
Use email as username to allow for single-field signup. Adds shortcode for adding registration form to post.
Integrate NGP "Classic" (NGP VAN) donation, signup, and volunteer forms with your site.
The Request Access plugin is intended for WordPress website owners who want to allow people to sign up for their website in a controlled way.
The Mailinglijst plugin allows you to add a signup form for your Mailinglijst.
The Campayn plugin makes it easy to add subscribe forms for your Campayn lists, or subscribe your commenters to a list.
Integrate Mad Mimi with your WordPress website: includes signup form widgets and automatically adding registered users to lists.
Плагин подписывает email комментатора в выбранный лист в сервисе MailChimp.
Add an iContact newsletter signup form to your sidebar or content and easily update how the form looks.
The GeniusContacts plugin allows you to quickly and easily add a signup form for your GeniusContacts list.
This plugin adds missing or not yet implemented functionality to bbPress.
The simplest way to turn your standard WordPress website with a standard WordPress theme into a Social Network.