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.
The plugin provides feature to enable/disable auto login when user register
Enable your readers to subscribe to custom email alerts for all the topics, authors and categories of your website.
This plugin allows you to insert a checkbox at the end of your comment forms so your viewers can double optin to a Aweber list of your choosing.
An addon for the Affiliates Manager plugin to signup the affiliates to your MailChimp list
Safe Signup Form is a WordPress Plugin that will forward a form submission to an email address, while preventing most automated attacks.
This plugin adds missing or not yet implemented functionality to bbPress.
Simple plugin to add a newsletter sign-up form to your website
An easy way to place a GetResponse form on your WordPress site.
The Campayn plugin makes it easy to add subscribe forms for your Campayn lists, or subscribe your commenters to a list.
The Import Users to MailChimp allows you to quickly and easily import all existing users to mailchimp.
Simple WordPress Constant Contact Plugin to take name and email and allow to send that information straight to Constant Contact
Use this plugin to create content upgrades, which require your readers to subscribe to your email list to get access to the bonus materials.
An easy way to place a Aweber form on your WordPress site.
An easy way to place a Mailchimp form on your WordPress site.
Integrate MailChimp in your WordPress site with AJAX powered customizable multiple form without touching code.
Add a signup form to your website. Send stunning newsletters to your subscribers using ActiveTrail, the world's leading email marketing solution.
Get the WordPress eFlyerMaker's Newsletter Sign Up Forms Builder Plugin. Ready-to use, 100% customizable, Including more than 75 specials effects
Emma Email Signup is a plugin to add an email signup form for your Emma account in your WordPress site.
Simple email marketing subscribers collector. If you know how to email, you know how to CakeMail.
Add extra columns to the Users screen - number of comments and all post types, registration & login dates and IP addresses.
Adds a signup widget for a MailMojo mailing list to your WordPress site.
The ExpressPigeon Subscription Form allows you to easily add a newsletter subscription form to your WordPress blog or site
Enables shortcode to embed ToneDen's Lasso widget in WordPress blogs.
Add subscribers to a user-provided MailChimp list after checkout with Paypal
An addon for the Affiliates Manager plugin to signup the affiliates to your MailPoet Newsletter list
Embed a StreamSend sign up form to your website: users will sign up from your own website instead of from the StreamSend website.
antispam question for signup and comment forms of wordpress, set by admin, supports Multisite mode
Limit user registrations to domain names on a whitelist.