many university programs offer at least $1,000 per year for books and educational expenses. usually as you increase in PGY years you get more money. The places I've seen on average start you off with $400 for pgy1 and something like $800 for pgy3/4. many programs include board review courses or licensure fees in the educational fund so if you don't take a board review course you get more money to use for other educational things.
The best I have seen so far was $6,000 for the 4 year residency and it's heavily weighed in the pgy1 and pgy4 years, because they'll pay for your step3 and board review.
maybe it's specialty dependent? but it sounds like it should be hospital dependent. but i noticed that university based residency programs offer more education funds than community based programs.