Elfsight - Upgrade your website without coding.
Typeform - Create beautiful, next-generation online forms with Typeform, the form & survey builder that makes asking questions easy & human on any device. Try it FREE!
The SEO Framework - Easy SEO for beginners, an awesome API for experts. WordPress SEO for everyone.
Wufoo - Wufoo's HTML form builder helps you create online web forms. Use our web form creator to power your contact forms, online surveys, and event registrations.
WP Rocket - WP Rocket offers a caching plugin for Wordpress.
Yoast Plugins - Yoast offers plugins to improve SEO and optimize web sites and blogs.