Cargo is a professional site building platform for designers and artists.
Handlebars is a JavaScript library used to create reusable webpage templates.
Open Graph is a protocol that is used to integrate any web page into the social graph.
OpenResty is a web platform based on nginx which can run Lua scripts using its LuaJIT engine.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.