Ash HN: How can I make my idle CPU time useful to others?

Knowing that my computing resources just sit there unused bothers me.

It would be relaxing to know that my idle CPU/bandwidth helps others.

Previous/older solutions:

- SETI (discontinued, [1])

- Leave BitTorrent open (risky)

Are there any current distributed SETI-like projects that I can trust?

[1] https://setiathome.berkeley.edu/