This plugin currently has only the minimum required maintenance releases.
Main maintainer has been handed over from @inc2734 to @websoudan.
MW WP Form can create mail form with a confirmation screen using shortcode.
https://mw-wp-form.web-soudan.co.jp
https://github.com/web-soudan/mw-wp-form
Google Charts
Source: https://developers.google.com/chart/