Baidu Analytics (百度统计) is a free tool for tracking and reporting traffic data of users visiting your site.
cdnjs is a free distributed JS library delivery service.
Cloudflare Browser Insights is a tool that measures the performance of websites from the perspective of users.
Google Analytics is a free web analytics service that tracks and reports website traffic.
Hexo is a blog framework powered by Node.js.
Open Graph is a protocol that is used to integrate any web page into the social graph.