Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.
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.
Twitch is an American video live streaming service that focuses on video game live streaming, including broadcasts of esports competitions.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.