Jetpack - Jetpack offers SEO and security plugins for Wordpress.
Contact Form7 Customizer - Customize your WordPress contact forms live at the front-end
WP User Manager - The most customizable profiles, community builder and membership WordPress plugin
Site Kit by Google - Bringing the best of Google tools to WordPress
UpStream Plugin - UpStream Plugin is a free-to-use project management plugin that allows you to manage various types of projects right from your WordPress site.
Joomla - Joomla! is the mobile-ready and user-friendly way to build your website. Choose from thousands of features and designs. Joomla! is free and open source.