Apache is a free and open-source cross-platform web server software.
Linkedin Sign-In is an authentication system that reduces the burden of login for users, by enabling them to sign in with their Linkedin account.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Reddit Ads is an online advertising offering from Reddit.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.