Jetpack - Jetpack offers SEO and security plugins for Wordpress.
WP User Manager - The most customizable profiles, community builder and membership WordPress plugin
MainWP - A Free, Open-source, & Self-hosted one-stop solution to manage Unlimited WordPress websites from a single dashboard. MainWP is the only management plugin with 2000+ ⭐⭐⭐⭐⭐ reviews on WP.org
Kanban Boards for WordPress - Kanban Boards is an easy-to-use project management plugin for the WordPress site that allows you to manage projects having the right agility.
Wordfence - Comprehensive security plugin for WordPress.
Yoast - Yoast offers plugins to improve SEO and optimize web sites and blogs.