There are many ways to help the project:
Since there are so many different combinations of installed software packages, configurations and applications, testing is a really time- and hardware consuming job.
Helping testing and reporting results (including bug reports) means more time for the developers to focus on actual development.
Improvements and extensions to the existing documentation (manual pages) and also links to other documentation material are very welcome.
Code contributions like bug fixes or new features are very welcome.
This project has been very time consuming so far. Basically a full time job without payment. Donations will make sure that this project can be continued.