Another Mac mini that I use for dev work that’s also running sonarr, radarr, bazarr, plex and Hoobs under MacOS
A Dell R170 running a number of VMs (windows and Linux) that host a couple of websites , and a load balancer on proxmox.
Things are a bit spread out where I sometimes just had to use the hardware I had to hand but it all works together somehow.
Edit: I’ve also just spun up a MediaWiki for me and my colleagues to use to store useful snippets of code etc. in a central place. Although I know my colleagues, they’ll use it once and then it’ll be abandoned :D