IE NetRenderer

Free service from a datacenter in Germany that allows you to check the rendering of any website in IE 5.5, 6, 7, or 8. It’s fast — it returned each screenshot for me in about 5 seconds. Screenshot size seems to be fixed at 1024×768, so you won’t see anything “below the fold” and there doesn’t seem to be a way to modify that size. But hey, it’s free. They also list and describe other screenshot services. (via Dan Benjamin)