Plugins

EditorsKit
https://editorskit.com/

FancyBox for WordPress
https://wordpress.org/plugins/fancybox-for-wordpress/

LoginPress
https://wpbrigade.com/

NextGEN Gallery
Imagely

NextGEN Pro
Imagely

Stackable
https://wpstackable.com/

Swift Performance Lite
https://swiftperformance.io/

WP DSGVO Tools (GDPR)
https://legalweb.io/

WP Migrate DB
https://wordpress.org/plugins/wp-migrate-db/

WP-Optimize – Clean, Compress, Cache
https://getwpo.com/