Stream tracks logged-in user activity so you can monitor every change made on your WordPress site in beautifully organized detail.
http://wp-stream.com/
Widgets · WordPress Plugins
Get access to data on 80,773 websites that are Stream Customers. We know of 49,361 live websites using Stream and an additional 31,412 sites that used Stream historically and 32,718 websites in the United States.
Get a list of 80,773 websites using Stream which includes location information, hosting data, contact details, 49,361 currently live websites and 31,412 sites that used this technology previously and 32,718 websites in the United States currently using Stream.