A8.net is an affiliate marketing network.
i-mobile is a advertising platform for clients to advertise their product and for publishers to monetize their cyberspace.
OpenResty is a web platform based on nginx which can run Lua scripts using its LuaJIT engine.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.