Since the winter is basically already here, you might be cold at home. Instead of running a space heater in your room, maybe set up your computers to do some important science! It can put your hardware to the test, but every core counts!
There are a bunch of projects out there, ranging from medical research to space exploration. You can also run any number of these projects at once since they all use the BOINC manager to run.
A few cool projects I personally contribute to are:
A project comprised of somewhat smaller projects mostly for the medical field, researching diseases like Cancer, AIDS, and Ebola. Quite a few scientific papers came out of this project. This is an awesome one to start out with if you don't know what to contribute to first.
Linky dink: https://join.worldcommunitygrid.org?recruiterId=1060255 (CPU & Android)
Linky dink: http://boinc.bakerlab.org/rosetta/ (CPU & Android)
Dinky link: https://milkyway.cs.rpi.edu/milkyway/ (Can use CPU & GPU)
PrimeGrid uses your CPU and GPU to crunch some insanely big numbers in search of the next prime numbers.
Linky dink: https://www.primegrid.com/ (Can use CPU & GPU)
Not a BOINC project, but a great project to contribute to as well. This also does disease research involving protein folding, but has a different approach than Rosetta@Home does.
Linky dink: https://foldingathome.org/ (Can use CPU & GPU)
GPUGRID: Medical research that only runs on NVidia GPUs (http://www.gpugrid.net/)
Asteroids@Home: Study asteroids http://asteroidsathome.net/ (Can use CPU, GPU, Android, ARM processors)
LHC@Home: Particle and Accelerator Physics https://lhcathome.cern.ch/lhcathome/
Einstein@Home: Gravitational waves and pulsars https://einsteinathome.org/ (Can use CPU, GPU, Intel GPU, Android, ARM processors)
Collatz Conjecture: Trying to disprove the Collatz Conjecture (watch the Numberphile vid on that) https://boinc.thesonntags.com/collatz/ (Can use CPU, GPU, Intel GPU)