FastMail - Email, calendars, and contacts to highest standards of security, privacy and reliability.
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).
Zoho Mail - Zoho Mail is a secure, encrypted, and enterprise-ready email solution, a suite of apps tailor-made for your organization's needs.
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
Rackspace Email Hosting - Rackspace Email Hosting is a platform that provides business with web-hosted email services.
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies