What tools do you use for creating documentation

Hello,

For our software we are currently busy with improving the documentation, we have been looking at the reference manual of Zend Framework as a good example, but were wondering which tools are used by the different contributors. We would like to know about the writer tools that are used since generation tools are pretty standardized.

We have been looking at oxygenxml, but it seems a little too much work (yes I am lazy ;)) to actually have to type in all the docbook tags while writing the documentation.

Does anybody have a good suggestion / recommendation on certain tools to create documentation in docbook format?

Kind regards,