Carbon Ads is an ad tech company, that connects advertisers to users through targeted verticals called Circles.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
Hatena Blog is one of the traditional blog platforms in Japan.
jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.
JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.
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.
Plausible is an open-source alternative to Google Analytics.
Tippy.js is the complete tooltip, popover, dropdown, and menu solution for the web, powered by Popper.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.
Unpkg is a content delivery network for everything on npm.
Varnish is a reverse caching proxy.