Does anyone know some good free Groupware package for Linux (written in PHP with MySQL support would be nice).
I have tested a lot of free packages including "phpGroupWare" and "PHProjekt", but no one is perfect for my needs.
PHProjekt is the best so far, but it needs too much administration (I would just like to add a user by email and nothing more, the user can fill in the rest by themself). I also would like a Groupware package where you can switch on/off different modules/addons in a default configuration. Different languages support is also needed.
I guess I could modify the PHProjekt code myself, but it would take too much time - I'm doing this for my tenant-ownership community.
All suggestions are welcome!

Thanks!