Among the open source software offered by Google in recent times, mod_pagespeed is probably the most interesting, and is certainly intended to save a huge amount of time for web developers.
Google Chrome Interface with Mozilla Firefox with WebRTC
Recently, on the web, has arrived a new set of technologies for communication, which offers excellent voice quality, high-definition video and broadcasts with minimal delay.
We are talking about WebRTC.
Perhaps because of the meaning is not very clear his name (more or less: "touch someone with your finger to get his attention"), Poke is one of the least used features from those available on the Facebook...