A number of websites, some that I agreed to host for someone who was dying.
Jellyfin and a bunch of media
A lot of docker containers (Adguard, *arrs)
Zoneminder
Some routing and failover to provide this between main main server and a much smaller secondary (keepalived, haproxy, some of the docker containers)
Some development environments for my own stuff.
A personal diary that I wrote and keep track of personal stats for 15 years
Backup server for a couple of laptops and a desktop (plus automated backup archiving)
Main server is a ML110 G9 running Debian. 48G/ram. 256 ssd x2 in raid1 as root. 4tb backup drive. 4tb cctv drive. 4x4tb raid 10 data drive. (Separating cctv and backup to separate drives lowers overall iowait a lot). 2nd server is a baby thinkcentre. 2gb ram, 1x 128gb ssd.
Edit: Also traccar, tracking family phones. Really nice bit of software and entirely free and private. Replaced Life360 who have a dubious privacy history.