| Security & Bot Defense | |
| HSTS HTTP header forcing browsers to use secure HTTPS connections | 122.9M sites |
| Web Servers & Operating Systems | |
| Apache HTTP Server Long-established open-source web server software | 70.4M sites |
| HTTP/3 Modern web transport protocol over QUIC for faster connections | 147.9M sites |
| Languages & Back-End Frameworks | |
| Django High-level Python web framework for rapid development | 632.5K sites |
| PHP Server-side scripting language powering a large share of websites | 91.4M sites |
| Python General-purpose programming language used for web backends | 3.1M sites |
| TypeScript Typed superset of JavaScript compiling to plain JavaScript | 503.5K sites |
| Front-End Frameworks & UI Toolkits | |
| Bootstrap Popular CSS and component framework for responsive layouts | 37.9M sites |
| JavaScript Libraries & Widgets | |
| DataTables jQuery plugin adding sorting, paging, and search to tables | 824.2K sites |
| FullCalendar JavaScript calendar library for event scheduling displays. | 85.4K sites |
| Moment.js JavaScript library for parsing and formatting dates | 2.1M sites |
| Select2 JavaScript library enhancing select boxes with search and tags | 1.5M sites |
| Summernote Simple WYSIWYG rich text editor library for web forms. | 55.4K sites |
| jQuery Widely used JavaScript library simplifying DOM manipulation, events, and AJAX | 92.3M sites |
| jQuery UI jQuery-based library of UI widgets and interactions | 7M sites |
| spin.js JavaScript library rendering animated loading spinners | 370.1K sites |
| Fonts & Icons | |
| Google Font API Google service delivering free web fonts to websites | 90.8M sites |
| other | |
| Copenhagencloud - Copenhagen Cloud Aps | 11 sites |
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