I only know German ones: senfcall.de or bbb.digitalcourage.de

the big ones out there are BigBlueButton and Jitsi. they have a lot of public instances, so you can easily check if they fit your needs.

every provider who supports aliases. like foo+baa@bzz.tld where everything after the + is exchangeable. so you can use a ‘different’ mail for every service you use and just block where spam comes from via the alias.

Has a mobile app!

Maybe have a look at the tool from 0&0 called “shut up windows 10”

Russian moon probe crashed into … the moon.

Stating foss and not even linking the source is … hmm

In terms if logging: sys journal does the job for me …

I do run prometheus + grafana for some services but that is mostly for some fancy looking graphics nothing really usefull.

I would recomend you to monitor updates of you apps so you are well informed when und what to update (i just have subsribed to all the diffrent release git rss feeds)

Nothing realy exept licencing

Maybe consider using forgejo (gitea fork used by codeberg)

And i do think, some changes would be needed but nothing big, also it wouldnt ne activated by default.