Apache is a free and open-source cross-platform web server software.
Hoefler&Co is a digital type foundry (font design studio) in Woburn, Massachusetts (formerly New York City), founded by type designer Jonathan Hoefler. Hoefler&Co designs typefaces for clients and for retail on its website.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Zendesk is a cloud-based help desk management solution offering customizable tools to build customer service portal, knowledge base and online communities.