Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
simperium - Move data everywhere it's needed, instantly and automatically
Microsoft IIS - Internet Information Services is a web server for Microsoft Windows
GUN - Self-hosted Firebase.
LiteSpeed Web Server - LiteSpeed Web Server (LSWS) is a high-performance Apache drop-in replacement.
PubNub - PubNub is a real-time messaging system for web and mobile apps that can handle API for all platforms and push messages to any device anywhere in the world in a fraction of a second without having to worry about proxies, firewalls or mobile drop-offs.