CKEditor for WordPress - https://wordpress.org/plugins/ckeditor-for-wordpress/
Demo showing how to use WPGraphQL as the source for Gatsby Sites
EpicEditor for WordPress enables a Markdown text editor to be used along side WordPress' default text editor.
Easily add various sign-up methods for your MailChimp list(s) to your WordPress website using this plugin.
The Block Editor project for WordPress and beyond. Plugin is available from the official repository.
Got any useful tips about wp-graphql/wp-graphiql?