My daughter's class uses an online software, I believe. I will ask her tonight when she gets back from school and will post it here.
Her (DD) speed has been increasing steadily. She is somewhere in the 60+ or 70+ wpm aree (I think?)

When kids were little, we used Jumpstart Keyboarding.
I don't know if it was good, like with all of the games the novelty wears off after a while. But I really liked Jumpstart series for everything, so I might be biased. Do they still have it around?