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 86,308 websites that are Stream Customers. We know of 26,282 live websites using Stream and an additional 60,026 sites that used Stream historically and 15,850 websites in the United States.
Get a list of 86,308 websites using Stream which includes location information, hosting data, contact details, 64,379 currently live websites which includes 38,097 domains that redirect to sites in the list. 60,026 sites that used this technology previously and 15,850 websites in the United States currently using Stream.