XAMPP - XAMPP is a free and open-source cross-platform web server that is primarily used when locally developing web applications.
ManageWP - ManageWP is a service for bloggers, site owners and web based companies helping them manage multiple WordPress sites from one dashboard.
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
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
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
InfiniteWP - Manage unlimited https://alternativeto.net/software/wordpress/ sites from a central admin panel.