Contao

Contao is an open-source content management system built with PHP, designed for creating accessible and professional websites. It emphasizes web standards compliance, semantic HTML markup, and built-in accessibility features meeting WCAG guidelines. Contao provides a modular architecture where functionality is organized into core modules and installable extensions from a centralized repository. The CMS includes multi-language support, user and group management with fine-grained permissions, and workflow features for content approval. Contao offers a live editing mode where editors can modify content directly on the frontend with a WYSIWYG experience. It supports responsive design out of the box and provides tools for managing forms, calendars, news, FAQs, and other common website elements. Contao is particularly popular in German-speaking countries and among organizations requiring strict accessibility compliance for government or institutional websites.