I’ve setup egroupware before and it works ok, you got various applicaitions, FeLaMiMail (what a strange name) for email. a calendar, address book, document management, project manager, resources, tracker, file manager, and even wiki. That’s a lot of applications. I saw a gallery php script integration module not bundled here, there are probably more applications.
The thing with egroupware is that installation can be quite complicated. I installed from source on CentOS 5 and after fixing numerous things it complained about I got almost lost in the installation process. Once I finished the installation I noticed you can not change the language. The only language available was English and my client wanted German. So I drilled Google for answers and drilled some more and found out I had to install it in German to have German language available later on. WTF! So I did that, and it was not easy since I don’t know German that well and I got it working. Now I can choose only German and English languages…