

Meshtastic
BOINC
Tor
I2P
Just off the top of my head. Meshtastic is probably the most similar to Helium but I don’t know what Helium is and their landing page makes me not want to. BOINC supports projects not in the official lists, just google around.
I’ve found a few exposed
/metrics
for kubernetes stuff because their IP poked my honeypot. I’d assume they’ve been hacked and turned into a botnet or something.