Most players of Kerbal Space Program live and die by their reaction wheels that turn electricity into momentum that allows you to point your spacecraft in any which way a lot like RCS that uses monopropellant. The problem with this is that reaction wheels aren't as easy to use in the real world and that you need multiple to point in all the directions instead of the just one you would need. I wanted to know if there was anything that was similar to the KSP Reaction Wheels that didn't consume propellant to move the spacecraft in a similar matter.
Magnetorquers are the most similar thing. They only work if one is around a strong magnetic field, usually low Earth orbit. They work by orienting the spacecraft to the magnetic field lines of the Earth, which will allow them to slowly change their positions with time, similar to a compass.