In short TYPO3 is a web content management class, and of course much more can be said about that. If you came here to know what TYPO3 is in general, you should visit TYPO3.com which will explain that to you in detail! When you are a few steps further, come back to TYPO3.org. TYPO3.org (where you are now) contains information for developers who already know what TYPO3 is and is trying to make it work and develop websites with it. If you are looking into developing websites with TYPO3 on a technical level or would like to find out more about the TYPO3 project, you should visit the "New to TYPO3" page.
kio_typo3 FREE Provides access to the TYPO3 templates like a file tree. The fields setup and constants are shown as normal textfiles. It uses the TYPO3 extension hr_kde_vfs which provides a xml rpc interface for a file system. Download