Can you share some with us (without appearing spammy or as an advertisement obviously)
I do not know if this is possible, I think it goes hand in hand.
In general I offer services which are privacy friendly, or privacy friendly alternatives to other existing services.
For example, Mastodon as a really good, but unfortunately still too little used alternative to Twitter or Jitsi as an alternative to Zoom and the other untrustworthy video conferencing providers.
Nextcloud (people here know it for sure) Currently not publicly accessible but by invitation only, but will change as soon as I have a good plan how to handle the legal issues.
We also have our own Gitlab instance to coordinate all our programming.
Teamspeak is for me the much better voice software, especially because I can host it myself, with Discord Voice I have had only bad experiences so far.
Discord, this is the only service that is not hosted by us and cannot really be described as privacy friendly. Unfortunately, even as a project you have to make some compromises. But I take care that no data from our other services is sent to Discord.
Otherwise you can create polls, shorten links or share code/texts.
Of course I also have some services that are not public, such as monitoring our servers and services:
https://github.com/phpservermon/phpservermon