ejabberd-contrib VS cocalc-docker

Also a fan of XMPP, ejabberd.im is a formidable piece of software that pretty much just works once you have it all set up and configured.

Yes, work out-of-box, and in case, you like to deny OMEMO in your server, there is even a ejabberd-contrib module for that.

I recently discovered Sagemath CoCalc.

You can download and use cocalc for free via a docker image: https://github.com/sagemathinc/cocalc-docker

I am the CEO of CoCalc, which is an alternatives to Overleaf that they don't own. I don't know whether or not our rules about personal data collection are compatible with your university requirements. Our default rules are at https://cocalc.com/policies, but we have been able to make modifications to them for particular customers. We also have a small easy to install on premises version here https://github.com/sagemathinc/cocalc-docker, and sell a more complicated Kubernetes-based on prem version of our software, so you control all data. Please feel free to email [[email protected]](mailto:[email protected]) with more detailed questions. In particular, it could be that we've already worked with your university to use CoCalc for collaborative Jupyter notebooks for teaching (that's the main thing CoCalc is used for, not latex), and that's something we can discuss in our support channels.

Mail - probably with mailu; and a multimedia server, but I haven't decided yet which one zenphoto? piwigo? lychee? or others?). Maybe seafile, although I probably don't need it given my use now of Syncthing and a backup strategy. And maybe... CoCalc (https://github.com/sagemathinc/cocalc-docker) as it'd be great to be able to run this from any machine, rather than having to manage software for different platforms.