Typo3 is a content management system. It was named as one of the top 100 companies and projects in the digital content management industry. It is rapidly developing new features and will improve its standing.
Typo3 is an example of an evolution from tools to solutions. Typo3 was previously only available to specialists that could assemble the tools. This has changed and Typo3 provides a means to access collective innovation and deliver content management solutions to solve problems. Typo3 has an intuitive graphical user interface and over 1,000 extensions can be downloaded and installed in real-time. The current interface is more intuitive and the functionality of your web site can be extended by downloading and installing over 1000 extensions in real time. These extensions are maintained by a large and talented user community. Your potential online network may simply be a handful of extensions from the Typo3 extension repository. The extensions are usually designed to be customised. To understand the real capability of each extension, you need to read the online documentation for the extensions you utilise.
Hackers and other social and business entrepreneurs could build online networks with Typo3 rapidly. Typo3 does have a steep learning curve. I would encourage you consider using Typo3 as the basis of an online network. If you do use Typo3, please support the community by using community developers, giving donations or publicising your use of the technology.