There are multiple ways to evaluate usage. I’ll go with what I would guess is your desired measurement, things that I use intentionally (as opposed to things like dns, which just happen incidentally to other things or automation based things which are continuously running but not necessarily interacted with):
Mastodon
An app I’ve written to collect personal data
Jellyfin
Lemmy
Bitwarden (I pay to self-host as opposed to vaultwarden as the latter probably won’t have a security audit)
There are multiple ways to evaluate usage. I’ll go with what I would guess is your desired measurement, things that I use intentionally (as opposed to things like dns, which just happen incidentally to other things or automation based things which are continuously running but not necessarily interacted with):