StableBit DrivePool - State of the art, file based drive pooling software.
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).
Greyhole - Greyhole is an application that uses Samba to create a storage pool of all your available hard drives, and allows you to create redundant copies of the files you store, in order to prevent data loss when part of your hardware fails.
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
mhddfs - The driver combines a several mount points into the single one.
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies