BOINC lets you help cutting-edge science research using your computer (Windows, Mac, Linux) or Android device. BOINC downloads scientific computing jobs to your computer and runs them invisibly in the background. It’s easy and safe, you can check it out here.
This is the entry paragraph on the Berkely University BOINC website: "The BOINC software, short for Berkeley Open Infrastructure for Network Computing, can also be installed on Raspberry Pis, making your Raspberry Pi your own little science research station. This way, you can help science projects such as SETI@home, Einstein@Home, Universe@Home, and many more."