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).
Socket.io - Realtime application framework (Node.JS server)
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
Ably - Serious realtime infrastructure
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Pusher - Pusher is a hosted API for quickly, easily and securely adding scalable realtime functionality via WebSockets to web and mobile apps.