What are some alternatives?
When comparing Yoast Plugins and WPMU DEV, you can also consider the following products
Gravity Forms - Gravity Forms is one of the best and easiest contact form plugins to create modern forms for websites powered by widely-used WordPress.
Pareto Security - Pareto Security is a Wordpress Security plugin
Wordfence - Comprehensive security plugin for WordPress.
MAMP - MAMP is the abbreviation for Macintosh, Apache, MySQL, and PHP. It is a reliable application with its four components that allows you to access the local PHP server as well as the database server (SQL).
WP Rocket - WP Rocket offers a caching plugin for Wordpress.
Jackmail - A newsletter plugin for Wordpress.