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 287,957 websites that are Socket.IO Customers. We know of 53,106 live websites using Socket.IO and an additional 234,851 sites that used Socket.IO historically and 26,525 websites in the United States.
Get a list of 287,957 websites using Socket.IO which includes location information, hosting data, contact details, 53,106 currently live websites and an additional 87,006 domains that redirect to sites in this list. 234,851 sites that used this technology previously and 26,525 websites in the United States currently using Socket.IO.