Makes sharing on Google+ easy
https://developers.google.com/+/plugins/share/
Widgets
Get access to data on 283,841 websites that are Google Plus One Share Button Customers. We know of 38,322 live websites using Google Plus One Share Button and an additional 245,519 sites that used Google Plus One Share Button historically and 21,597 websites in the United States.
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Get a list of 283,841 websites using Google Plus One Share Button which includes location information, hosting data, contact details, 38,322 currently live websites and an additional 14,197 domains that redirect to sites in this list. 245,519 sites that used this technology previouslyand 21,597 websites in the United States currently using Google Plus One Share Button.
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