Simple plugin to add a newsletter sign-up form to your website
s2Member® — a powerful (free) membership plugin for WordPress®. Protect members only content with roles/capabilities.
The ultimate plugin and service to stop and kill splogs in WordPress Multisite and BuddyPress, from WPMU DEV.
An online sign-up sheet manager where your users/volunteers can sign up for tasks
The GetResponse Integration plugin allows you to quickly and easily add a sign-up form to your site.
The most advanced protection against sploggers and spam users registration, is fully WordPress,WordPress MU ,BuddyPress and bbPress 2.0 compatible
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.
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.
This plugin allows you to insert a checkbox at the end of your comment forms so your viewers can double optin to a MailChimp list of your choosing.
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.
To send newsletters. Features: collect subscribers on registration or with an ajax widget, mailing lists, cron batch sending, multilanguage, bounces.
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
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