ChargeForms is a drag-and-drop form builder for WordPress. Build contact forms, surveys, and lead-capture forms with a fast, modern builder — no page reloads, no bloated front-end scripts slowing your site down.
Free for real form-building:
This plugin optionally connects to a number of third-party services, every one of them off by default. Full detail on each is in the “What external services does this plugin use?” FAQ above; summarized here per the WordPress.org guideline: