You can try the latest demos of TYPO3 from both Frontend (visitors) and Backend (administrators) views. You can edit the demos safely and easily, knowing that all edits are rolled back daily.
TYPO3 is one of the best established Open Source Content Management Systems. Because it is an enterprise-level system, we find large corporations are willing to contribute to TYPO3's security, growth, and development. Official support avenues include:
The TYPO3 website at TYPO3.org provides links to both general and technical information for those using or considering TYPO3.
A non-profit corporation in Baar, Switzerland -- the TYPO3 Association -- provides overall guidance to the development of TYPO3. It is supported by memberships, donations, and the annual TYPO3 conference.
The community of users, developers, and customers includes 100,000 people in over forty countries. It includes both local and national User Groups who interact online through Twitter, YouTube, Slack, IRC Chat and the TYPO3 Forums.
TYPO3's TER (TYPO3 Extension Repository) contains thousands of extensions to enhance the TYPO3 experience for site users, site owners, and developers. They range from front end plugins like News, Photo Galleries, and Calendars to enhanced security tools and design templates. All are freely available. The listings contain details, such as documentation and the number of downloads, to help choose between them.
TYPO3 and many of its extension developers maintain their code using Github, where over 4,000 code repositories are in place.