I'm looking to set up a group on a collaboration platform for me and my friends. It should have the following features:
- no hosting / installation necessary
- mailing list or a message board with mail notification
- signup with any email should be possible (for google groups you need a gmail account AFAIK)
- a calendar would be nice to set up meetings
- possibility to upload files
I would like something similar to Google Groups but without the restrictions on having to have a Gmail account.