Robin is Good. Free is good. In fact, it’s all good with Robin Good’s impressive and exhaustive list of free stock photography archives. Not all are available for use in commercial work, but plenty are.
Although I’ve always assumed there would be plenty of free imagery out there if you were prepared to look, I think the most impressive part is the quality. Most of the sites listed are professionally presented and the stock they contain is mostly high quality.
In reality, it won’t replace the large commercial photo stock companies. The availble selection is probably still not wide enough to cover all situations, and the times when you need a very specific photo quickly, the large stock sites like Corbis and Creatas are still going to be your best bet.
Still, when all you’ve got to lose is time, it’s a nice place to start.