Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
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).
Textpattern - Textpattern is an elegant content management system that is free, open source software.
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
TYPO3 - TYPO3.com - Infos, SLAs, Extended Support Versions and more
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies