Newsletter Opt-In Checkbox on the Comment Form
Adds an unticked "Send me the newsletter" checkbox to the comment form and lets you download the email addresses of commenters who opted in as a CSV from Tools.
Snippet Library
Forms snippets for WordPress
Snippets for forms and the plugins that build them: validation, spam protection, hidden fields and what happens after a form is sent. For sites that collect leads, bookings or support requests.
Newsletter Sign-Up With Double Opt-In
Adds a [wpide_newsletter] sign-up shortcode that stores subscribers in the admin, emails a confirmation link (double opt-in), and lets you export confirmed addresses as CSV.