Hosted Nextcloud. Hear good things about Hetzner Storage Share.
privsecfoss
A Library. Or if digital, Wikipedia and Archive.org.
Firefox and VLC on Windows for years, which just worked. Later XBMC/Kodi and fileserver which where s... on windows but, again, just worked on Linux. When Windows later on kept nagging for something I migrated to 100% Open Source and have been a happy camper ever since!
I'm using Floccus. It has sync to Nextcloud and browser, but seems to work fine offline. Maybe it will work in your usecase.
Conversations or blabber.I'm (fork of the former) are solid. Both on f-droid.
KISS from f-droid.
Maybe not what you're looking for but using Kodi on Pi and laptops as Mediecenter.
- 1 for XMPP /Jabber
Thanks for sharing. Was looking for something like this so I don't need to have multiple beefy gaming PC's.
I have used Linux for a while and transitioned the wife and kids to Linux Mint a couple years ago.
They know it is different than Windows but never miss anything as the alternatives are as good or better. The kids are used to mobile and tablets so know of app store and so on. The only downside is getting some games their friends play working, like Roblox. But for the most part alternatives like Minetest are fine (better).
The upside is IMHO massive in terms of privacy, security, user friendless and sysadm stuff.
It just works and we're happy with it!
XMPP / Jabber with OMEMO encryption. Lots of free servers and clients.
Nice try, Microsoft