I appreciate this, but here are a few actually-useful (to my family) that I have committed and that are still in use today:

- a Growatt -> pvoutput.org data extractor/uploader (w/C.H.I.P.)

- a MAME Arcade (Raspberry Pi 2)

- ISS Above tracker (Raspberry Pi 2) ()

- My main SSH gateway and Seafile server (Raspberry Pi 2)

I may finish my Espresso PID/controller this year (Rascillio Silvia) (Raspberry Pi 3)

() ISS Above is amazing for engaging my kids and myself in Astronomy. EDIT: formatting