Plugins

ShortCodes Ultimate  extra “tweaks” to your site https://wordpress.org/plugins/shortcodes-ultimate/

SiteOrigin Widgets Bundle – collection of widgets, neatly bundled into a single plugin:  https://wordpress.org/plugins/so-widgets-bundle/

SEO

Yoast SEO https://wordpress.org/plugins/wordpress-seo/

SOCIAL

Sumome or SuperSocializer for SOCIAL sharing https://wordpress.org/plugins/sumome/

SPEED

W3 Total cache https://wordpress.org/plugins/w3-total-cache/

SECURITY

WordFence for security https://wordpress.org/plugins/wordfence/

Duplicator clones and migrates your site https://wordpress.org/plugins/duplicator/

OTHER

WP Edit edit content toolbar with fonts, media and grid [note: grid requires in settings/Post/Pages Enable the column shortcode]https://wordpress.org/plugins/wp-edit/

WP Maintenance Mode https://wordpress.org/plugins/wp-maintenance-mode/

The visual editor widget for WordPress: https://wordpress.org/plugins/black-studio-tinymce-widget/

Page Builders

Page Builder by SiteOrigin –  Build responsive page layouts using the widgets you know and love using this simple drag and drop page builder: https://wordpress.org/plugins/siteorigin-panels/

Elementor Page Builder – The most advanced frontend drag & drop page builder. Create high-end, pixel perfect websites at record speeds: https://wordpress.org/plugins/elementor/ or https://elementor.com/