One of my all-time favourites is the well-known Sprint real-time dashboard from 2008, Plug Into Now.
The Economist had an interesting one on how big companies fared with hittting $1 million in revenues earlier this year, which has been one of their most popular charts of 2014.
And this new one from community-driven reviews site Trusted Company shows what India spends its money on in retail, in real-time.