XperienCentral - XperienCentral is an open API content management solution that allows you to add, edit or remove content without having to touch a line of code.
Asterisk - An open source telephony switching and private branch exchange service for Linux.
Sitecore Experience Manager (XM) - Sitecore Experience Manager (XM) is a powerful content management system for organizing and publishing digital information.
FreeSWITCH - FreeSWITCH is an open-source media application designed to support popular protools such as SIP and WebRTC and provides a platform to develop voice and video applications.
WP Engine - Hassle-Free WordPress Hosting
FusionPBX - FusionPBX is an open source FreeSWITCH GUI.