https://getwpo.com/

WP-Optimize is a revolutionary, all-in-one plugin that cleans your database, compresses your large images and caches your site. This simple, popular and highly effective tool has everything you need to keep your website fast and thoroughly optimized! Help boost SEO, retain customers by reducing user bounce and do more with fewer server resources.

https://www.wpfastestcache.com/

This plugin creates static html files from your dynamic WordPress blog. When a page is rendered, php and mysql are used. Therefore, system needs RAM and CPU. If many visitors come to a site, system uses lots of RAM and CPU so page is rendered so slowly. In this case, you need a cache system not to render page again and again. Cache system generates a static html file and saves. Other users reach to static html page.Setup of this plugin is so easy. You don’t need to modify the .htacces file. It will be modified automatically.

WP Staging Pro v6.2.1 - Creating Staging Sites - NULLED

https://wp-staging.com/

Clone Your WordPress & Copy Staging Changes to Live Site. WP Staging Allows You to Work Safely on Your Website: Copy db & files from staging to live site; Exclude specific db tables & folders; Very fast cloning process; User roles authentication; Even huge websites are supported; Very simple to use.

https://wedevs.com/wp-user-frontend-pro/

Let your users manage everything from Frontend! Effortlessly build Registration Forms, Profiles, WooCommerce Products, Subscriptions & Contact Forms with Custom Post Types support.

WP Meta SEO Addon - The WordPress SEO Friendly Plugin v1.5.2

https://www.joomunited.com/wordpress-products/wp-meta-seo

The WP Meta SEO plugin gives you a full control over your WordPress website's SEO with accurate & advanced tools. WP Meta SEO comes with time-saving tools, including: a meta information bulk editor, an image SEO optimization, a powerful XML sitemap generation and a redirect manager. The latest Pro version comes with a unique Google Search Console integration that suggests the best keywords to add in your content, using Google data!