Apache is a free and open-source cross-platform web server software.
Gatsby is a React-based open-source framework with performance, scalability and security built-in.
Open Graph is a protocol that is used to integrate any web page into the social graph.
OpenSSL is a software library for applications that secure communications over computer networks against eavesdropping or need to identify the party at the other end.
Unix is a family of multitasking, multiuser computer operating systems.