What are some alternatives?
When comparing WPMU DEV and MAMP, 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.
XAMPP - XAMPP is a free and open-source cross-platform web server that is primarily used when locally developing web applications.
Pareto Security - Pareto Security is a Wordpress Security plugin
Microsoft IIS - Internet Information Services is a web server for Microsoft Windows
Yoast Plugins - Yoast offers plugins to improve SEO and optimize web sites and blogs.
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies