LikeBtn widget is a like counter, it allows to add the Like Button on the website with just a few lines of code.
http://likebtn.com/
Widgets · Social Sharing
Get access to data on 19,908 websites that are LikeBtn Customers. We know of 6,363 live websites using LikeBtn and an additional 13,545 sites that used LikeBtn historically and 3,100 websites in the United States.
Get a list of 19,908 websites using LikeBtn which includes location information, hosting data, contact details, 9,138 currently live websites which includes 2,775 domains that redirect to sites in the list. 13,545 sites that used this technology previously and 3,100 websites in the United States currently using LikeBtn.