Socket.IO aims to make realtime apps possible in every browser and mobile device, blurring the differences between the different transport mechanisms.
http://socket.io
JavaScript Libraries and Functions · JavaScript Library
Get access to data on 246,374 websites that are Socket.IO Customers. We know of 73,498 live websites using Socket.IO and an additional 172,876 sites that used Socket.IO historically and 33,358 websites in the United States.
Get a list of 246,374 websites using Socket.IO which includes location information, hosting data, contact details, 73,498 currently live websites and an additional 165,728 domains that redirect to sites in this list. 172,876 sites that used this technology previously and 33,358 websites in the United States currently using Socket.IO.