Yes, and they should offer it for a fee on the Windows store as well. Maybe a version with email support on ubuntu store also?

Exactly. Many of the problems with the Internet today can be traced back to there being too few and too large companies. https://pbs.twimg.com/media/Er...

There are newer, better alternatives available. Check out https://matrix.org/ - federating (like email or irc), first-class bridging (access irc, slack, telegram, signal, whatsapp, ...), open, ...

Hopefully not, as there are newer, better alternatives available. Check out https://matrix.org/ - federating (like email or irc), first-class bridging (access irc, slack, telegram, signal, whatsapp, ...), open, ...

Chat and email serve different purposes. But for chat we need something that works like email; something that federates and interoperates. That something is called matrix.org

It's open core. Look into matrix.org / riot.im instead

Or Gitlab, which also has free CI resources (for private projects)

Collaborative being a key word, I didn't get the impression that Open365 allows google docs style concurrent collaborative editing. EtherCalc should work, but is of course limited in features: https://ethercalc.net/

Subversion can lock files in order to avoid merging binary files

http://git-annex.branchable.com/

Check out ganeti as well: https://code.google.com/p/ganeti/

Features
Ganeti provides the following features for managed instances:

Support for Xen virtualization:
Support for PVM and HVM instances
Live migration support
Virtual console (on PVM) or VNC (on HVM) to control instances
Support for virtio or emulated devices

Support for KVM virtualization: (from Ganeti 2.0)
Live migration support
Support for fully virtualized instances
Support for semi-virtualized instances (kernel residing on the host)
Support for VNC or serial access
Support for virtio or emulated devices

Recommended cluster size 1-40 physical nodes

Disk management:
Plain LVM volumes
Files (from Ganeti 2.0)
across-the-network raid1 (using DRBD) for quick recovery in case of physical system failure

Instance disk partitioning supported from Ganeti 2.0

Export/import mechanism for backup purposes or migration between clusters, or

Automated instance migration across clusters (since Ganeti 2.2)

Are you sure there was no data corruption, or are you just assuming since it booted up again?

Can you actually share a password with several users using phpchain? It seems to me like everyone only has access to their own passwords.

Puppet combined with either Foreman or Cobbler

Surely you are joking?