cdnjs is a free distributed JS library delivery service.
Google Hosted Libraries is a stable, reliable, high-speed, globally available content distribution network for the most popular, open-source JavaScript libraries.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
LogRocket is a logging and session replay platform that helps developers identify and troubleshoot issues in web applications by recording and replaying user sessions, along with capturing logs and user interactions in real-time.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Prototype is a JavaScript Framework that aims to ease development of web applications.
RevolverMaps is a collection of real-time visitor statistics widgets for website or blog. Interactive visitor mappings to a globe rendered by the Revolver Engine.
Configurable JavaScript/CSS spinner that can be used as a resolution-independent loading indicator
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.