There are several apps that can be of use for vets - I'm not sure if you'll find them useful as a student, though they do offer some good reference info: Things like the CVP (Compendium of Veterinary Products) which is free, and ChocTox (a small animal toxicity calculator, also free). And Epocrates Rx (for iPad - free) is a human medication app, but can still be handy, not only because we use a lot of human meds in animals, but also in cases of toxicity, when a pet has unfortunately eaten some of its owner's medication.