Plugin for inserting all kinds of Social bookmarking & sharing buttons.
https://wordpress.org/plugins/wp-socializer/
Widgets · WordPress Plugins
Get access to data on 49,203 websites that are WP Socializer Customers. We know of 9,141 live websites using WP Socializer and an additional 40,062 sites that used WP Socializer historically and 5,550 websites in the United States.
Get a list of 49,203 websites using WP Socializer which includes location information, hosting data, contact details, 9,141 currently live websites and an additional 3,517 domains that redirect to sites in this list. 40,062 sites that used this technology previously and 5,550 websites in the United States currently using WP Socializer.