A bunch, mostly for "production":

• Jellyseerr
• Jellyfin
• Radarr
• Sonarr
• Bazarr
• Lidarr
• Readarr
• Powlarr
• Sabnzbd
• Transmission
• JDownloader
• nginx proxy manager
• pihole
• mailcow
• snibox
• syncthing
• syncthing relay
• zabbix
• Papermerge
• Webserver
• mqtt broker
• samba file sharing
• a few gameservers
• IRC client
• Paste service

And everything runs on proxmox ve and is backed up by proxmox backup server ;)