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 89,416 websites that are Stream Customers. We know of 27,135 live websites using Stream and an additional 62,281 sites that used Stream historically and 16,666 websites in the United States.
Get a list of 89,416 websites using Stream which includes location information, hosting data, contact details, 27,135 currently live websites and an additional 40,161 domains that redirect to sites in this list. 62,281 sites that used this technology previously and 16,666 websites in the United States currently using Stream.