There are plenty of supplements created by the nutraceutical industry. It's of course targeted to the general population, but specifically those who are in university cramming for exams or working where memory is key.
CanPrev has something called Mind-Pro , which averages about 80 dollars for 120 capsules.
http://www.canprev.ca/products/ingredients/mind_pro
Another is made by Advanced Orthomolecular Research (AOR) called Ortho Mind.
http://www.aor.ca/html/products.php?id=111
They're excellent products, but they are expensive.