Documentation
Generated documentation can be found here. All code in DTF can be documented using JavaDocs that allow the developer to both document new tags he/she has created as well as being able to document features within DTF. There has been a good effort to get as much of this type of documentation into the code as possible and a lot of the documentation currently in the doc folder will be slowly migrated into the code itself so that developers can easily update documentation as they make crucial changes. The documentation itself isn't very elegant looking but it does cover all of the available tags as well as some of the basic built in features that would otherwise be hard to keep the documentation up to date within a separate document.
Found on the Github Wiki newer write ups and tutorials that can easily be updated by other users/developers and maintained in a fresh and recent state for everyone to use.
This documentation exists in the repository and contains a lot of detailed information about how DTF works and how to write tests and plugins for DTF. Currently maintained in an ODT (Open Office) format and eported to PDF as well so that all users can easily get a format that will work well on their system.