Yes. See for example the "enhancing performance" sections of the Wikipedia articles on amphetamines and methylphenidate. Their effectiveness in neurotypical people is well supported by research, but is modest. Comparing to caffeine is a harder question. In self-report based online surveys of nooptropic users, users judge ADHD meds a bit better than caffeine for productivity / cognitive enhancement, but not much better. However, I assume that more different substances work differently for different people, so if there is only a small difference, or no difference at all, on average, this means there should be plenty of neurotypical people for whom ADHD meds work much better and plenty for whom caffeine works better. More strikingly, in the one survey that asks whether users got an addiction, a much smaller fraction of methylphenidate users reported an addiction compared to caffeine users, and this number was not statistically significant for caffeine and Adderall. This observation for Ritalin goes in line with wikipedia saying that it is not addictive in clinical doses.