Are There Other Particles That Move at the Speed of Light?

Light is the only thing we know that can go at that speed. Because they have no mass, they can move at that maximum speed. It's true for any massless ripple in a field. Gluons are weird because they interact very strongly with themselves. They conform weird states like glue balls, but those have energy inside of them. So glu Balls don't move at the speed of light, even if individual gluons do.