Add Contao

README.md

@@ -504,6 +504,7 @@ CMS are a practical way to setup a website with many features. CMS often come wi
 - [CMS Made Simple](http://www.cmsmadesimple.org/) - Open source content management system, faster and easier management of website contents, scalable for small businesses to large corporations. ([Source Code](http://svn.cmsmadesimple.org/svn/cmsmadesimple/trunk/)) `GPL-1.0` `PHP`
 - [Cockpit](http://getcockpit.com) - Simple Content Platform to manage any structured content. ([Source Code](https://github.com/agentejo/cockpit)) `MIT` `PHP`
 - [Concrete 5 CMS](http://www.concrete5.org/) - Open source content management system. ([Source Code](https://github.com/concrete5/concrete5)) `MIT` `PHP`
+- [Contao](https://contao.org/) - Contao is a powerful open source CMS that allows you to create professional websites and scalable web applications. ([Source Code](https://github.com/contao/contao/)) `LGPLv3` `PHP`
 - [CouchCMS](http://www.couchcms.com/) - Simple Open-Source CMS for designers. ([Source Code](https://github.com/CouchCMS/CouchCMS)) `CPAL-1.0` `PHP`
 - [Directus](http://getdirectus.com/) - Directus is a powerful and intuitive headless CMS for managing SQL databases with custom architectures. Built around a robust and extensible API, this decoupled content management framework is perfect for websites, apps, or multi-client projects. ([Source Code](https://github.com/directus/directus)) `GPL-3.0` `PHP`
 - [Drupal](https://www.drupal.org/) - Advanced open source content management platform. ([Source Code](http://cgit.drupalcode.org/drupal)) `GPL-2.0` `PHP`