We use MailChimp to send and manage the EfficientWP newsletters. While this post focuses on MailChimp, there are plenty of other great and affordable services out there, such as Constant Contact. However, MailChimp is completely free up to 2,000 subscribers or 12,000 emails per month, which should be more than enough for most small businesses.
Gravity Forms is a premium plugin for form management. Essentially, it allows you to create forms and insert them in your pages, posts, or sidebar. You can have a variety of form fields, from text boxes to drop-downs to upload buttons. The results are stored in WordPress, and optionally mailed to you and/or the email address listed in the form.
We are pleased to include the Gravity Forms plugin on our platform, at no additional cost. Normally, it costs $39/year to use this plugin on one website, but our developer license allows us to provide this to all of our customers.