"WP Optin Pro - New list building plugin!
Below are just some great features:
1. Supports All Major Autoresponder Services
The plugin supports all the major email marketing services, or autoresponder services currently present. Mentioned below are some of the autoresponders that the plugin supports - Aweber, Mailchimp, Get Response, Constant Contact, iContact, Interspire Script and many more.
Hence, if you’re using any of the above services or any other autoresponder services, WP Optin Pro should definitely be a great supportive tool for you.
2. Countless Options To Design Forms
3. Use Of Shortcodes Inside Content
Unlike the default codes by autoresponders (which cannot be put inside content), this plugin makes the use of shortcodes. This means that the forms that are created in the backend can be put anywhere within the pages/posts etc. The opt-in form is created in the backend, however the user prefers it to be, and then a simple easy-to-remember shortcode is placed anywhere within the content. If the user wants the form to appear within after the first paragraph, the only thing that needs to be done is placing the shortcode from the WordPress post editor – rest is taken care of by the plugin!
4. Placing Forms Into Sidebars
YES! The same opt-in forms that you’ve created in the backend (dashboard) are easily placeable inside the sidebars/footers! And this is nothing more than placing a Text Widget into the sidebar, and adding a shortcode inside it!"