What am I?

I can swim but never get wet. I can run but never get tired. I follow you everywhere but never say a word. What am I?

related riddles

My veins of green may go unseen, Til on the ground I lay around. What am I?

For most, I am fast. For others, I am slow. An obsession to all, I make the world go. What am I?

I am sometimes referred to as chips. What am I?