Apache is a free and open-source cross-platform web server software.
Carrot quest is a customer engagement and communication platform that aids businesses in improving interactions with users and customers through targeted messaging, in-app messaging, live chat, email campaigns, and user behavior tracking.
Open Graph is a protocol that is used to integrate any web page into the social graph.
PHP is a general-purpose scripting language used for web development.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.