| CMS & Website Builders | |
| WordPress Open-source CMS powering websites, blogs, and content management | 75.7M sites |
| Hosting & Cloud Providers | |
| Singlehop-Llc Network operator identifier detected via hosting infrastructure | 200.6K sites |
| Web Servers & Operating Systems | |
| Varnish HTTP reverse proxy and caching accelerator for web content | 6.1M sites |
| Languages & Back-End Frameworks | |
| PHP Server-side scripting language powering a large share of websites | 114.2M sites |
| JavaScript Libraries & Widgets | |
| Underscore.js JavaScript utility library offering functional programming helpers | 6.3M sites |
| imagesLoaded JavaScript utility detecting when page images have finished loading | 11M sites |
| jQuery Widely used JavaScript library simplifying DOM manipulation, events, and AJAX | 114.7M sites |
| jQuery Migrate Compatibility shim restoring deprecated jQuery APIs for older code | 53M sites |
| pickadate.js Lightweight JavaScript date and time picker | 278.8K sites |
| Databases & Caching | |
| MySQL Popular open-source relational database used by many web applications | 77.9M sites |
| Performance & Optimization | |
| SpeedyCache WordPress caching plugin improving site speed and page load times. | 101.7K sites |
| SEO & Content Discovery | |
| Open Graph Metadata protocol controlling how page links preview on social platforms | 151.8M sites |
| RSS Web feed format syndicating site content for readers and aggregators | 71.1M sites |
| other | |
| ACME/Let's Encrypt Free TLS certificates issued automatically over the ACME protocol | 11.7M sites |
| Gosmtp Smtp | 187.8K sites |
| WebSub (FKA. PubSubHubbub) Content & Media | 29.4K sites |
| ActivityPub Other | 5.9K sites |
| Webmention Other | 876 sites |
| Friends Content & Media | 848 sites |
| Enable Mastodon Apps Other | 507 sites |
| IndieAuth Security & Privacy | 403 sites |
| Micropub Other | 218 sites |
| IndieBlocks Design & Themes | 116 sites |
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