WP User Manager - The most customizable profiles, community builder and membership WordPress plugin
Yoast - Yoast offers plugins to improve SEO and optimize web sites and blogs.
Project Panorama - Project Panorama is an elegant and reliable WordPress manager plugin that comes with exciting features and tools that will allow managing your multiple WordPress sites with ease.
WP Rocket - WP Rocket offers a caching plugin for Wordpress.
Jetpack - Jetpack offers SEO and security plugins for Wordpress.
Wordfence - Comprehensive security plugin for WordPress.