wpplugins

Yoast SEO                 https://wordpress.org/plugins/wordpress-seo/
Smush                     https://wordpress.org/plugins/wp-smushit/
TinyMCE Advanced          https://wordpress.org/plugins/tinymce-advanced/
UpdraftPlus Backup        https://wordpress.org/plugins/updraftplus/
W3 Total Cache            https://wordpress.org/plugins/w3-total-cache/
WP Mail SMTP              https://wordpress.org/plugins/wp-mail-smtp/
WP Mail Logging           https://wordpress.org/plugins/wp-mail-logging/
Wordfence Security        https://wordpress.org/plugins/wordfence/
Easy FancyBox             https://wordpress.org/plugins/easy-fancybox/
Regenerate Thumbnails     https://wordpress.org/plugins/regenerate-thumbnails/
Ninja Forms               https://wordpress.org/plugins/ninja-forms/
Duplicate Post            https://wordpress.org/plugins/duplicate-post/
Advanced Custom Fields    https://wordpress.org/plugins/advanced-custom-fields/
EU Cookie Law             https://wordpress.org/plugins/eu-cookie-law/
HappyFiles                https://wordpress.org/plugins/happyfiles/ (https://happyfiles.io/)
Loco Translate            https://wordpress.org/plugins/loco-translate/
WPFront Scroll Top        https://wordpress.org/plugins/wpfront-scroll-top/
Captcha Code              https://de.wordpress.org/plugins/captcha-code-authentication/
WP-Optimize               https://de.wordpress.org/plugins/wp-optimize/
TablePres                 https://wordpress.org/plugins/tablepress/ (Datatables alternative)
Limit Login 
Attempts Reloaded         https://de.wordpress.org/plugins/limit-login-attempts-reloaded/
Post Types Order          https://wordpress.org/plugins/post-types-order/
Max Mega Menu             https://wordpress.org/plugins/megamenu/

Woocommerce
Show only lowest prices 
in variable products      https://de.wordpress.org/plugins/show-only-lowest-prices-in-woocommerce-variable-products/