adderall is good, the levo amp in it is more peripheral stimulating and what I would call a nootropic, straight dextroamphetamine less so, i prefer dextroamp alone however, less sides.
Ssri's aren't a nootropic perhaps the opposite.
modafinil, meh, it has a novel mechanism but seems to impact the reticular activating system for alertness and has no real dopaminergic component so it doesn't have that focus factor.