Arrangement is more diffuse than some other sites, but you can reach a number of good resources through it. I did not run into this link from other sites. Well organized site with a broader range of coverage than many others. It includes both free and subscription sources. I liked the brief annotations, although restricted resources are not identified.
Site is notable for the level of detail it provides.
I liked what they did with the Web links further down this page, although I don't think that most of these sites will be new to librarians.