NethServer - NethServer is an operating system for Linux enthusiasts, designed for small offices and medium...
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).
ClearOS - A very good alternative for Windows Server, for free
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
Univention Corporate Server - Univention Corporate Server UCS with Active Directory functions and App Center is the cost-efficient and popular successor to Microsoft's server solutions.
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies