Home APRS iGate
This is a Raspberry Pi 4B with an RTL-SDR running direwolf.
You can see stats at aprs.fi.
denhax APRS Digipeater/iGate
APRS Digipeater with iGate capability hosted at a local hackerspace
You can see stats at aprs.fi.
This is currently running on a Raspberry Pi 4B with a MFJ TNC-Pi hat connected to a Motorola GM300 radio running APRX.