Typo3
Having good content on a website is very often due to the use of content management systems. An editor, who does not need to be a technician, can keep the internet up-to-date.
Typo3 is one of the most advanced systems for managing internet sites. The system is easy to use for the editor and can be adapted for various tasks. The rights system is very advanced and even if there are 10 or more editors working on the same site there won't be conflicts between them.
Joomla!
The choice of a CMS depends on the requirements of the company. Joomla! is for small and medium sized sites a choice with many functions to create a modern website. The community is fast in implementing the latest gadgets. Handling and changing of templates can be done in a few minutes. This makes the development with Joomla! easy and fast.
Security is, of course, always a question, but the community reacts very quick to security gaps, which compensates for the risk.
Wordpress
Wordpress is already well-equipped in the standard configuration. As a CMS with many static content, it might not be the best choice. For quick publishing in a blog, however, it is very easy to set up and use. The combination of articles with categories and keywords along with chronological sorting makes it a simple and convenient system to publish information. It might directly link to the social networks and you can easily manage your other platforms such as Twitter, Facebook from your Wordpress backend.