Swem provides W&M students with access to several databases that provide useful data.
Over the last decade, there has been a boom in the quantity of free and publicly-accessible data. Below is a list of several of the most useful data sources.
But keep in mid that often a simple google search is the best way to find the data you're looking for. Furthermore, organizations and academics may not have made their data available online, but may be willing to send a spreadsheet to an eager student -- it can't hurt to ask!