Too many things:

Management:
Proxmox
Portainer

Services:

Pihole with Unbound
Matrix
cryptpad
seafile
Vaultwarden
mailcow
pterodactyl running Minecraft, Valheim, and Terraria servers
emby though I am planning the switch to Jellyfin
Paperless-NGX
Photoprism
SearxNG
Wallabag
Ghost
Miniflux
PrivateBin
Calibre-web and Kavita
Nitter and Troddit (for now...)
Home Assistant and Frigate
YOURLS
Code-server
Linkding
Changedetection.io
LanguageTool
Uptime Kuma

And more, but those are what I use the most.