The Web Squeeze has recently published a large collection of recommended places to find free stock photos.
Stock photos are very useful, and of course it’s nice to not have to pay for them. A well-placed photo can liven up a text-heavy blog post, and attract attention from StumbleUpon users if placed near the top. They’re also good for ad creatives, and other things where a photo can improve the overall look.
It’ll probably take you awhile to go through the list, but it’ll probably be worth your while if you bookmark some of your favorites as you check the sites out. Then you can refer to your more compact list of sites the next time you need a stock photo.