Online resource for calculations, graphics, and information on a wide range of topics including math, science, transportation, human geography etc. Great place to start your exploration for you IA as well as find data.
Google Scholar provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities, and other web sites.
Digital library of journals, academic ebooks, and primary sources. The collections include top peer-reviewed scholarly journals as well as respected literary journals, academic monographs, research reports from trusted institutes, and primary sources.
If you find information outside of a databases which provides a citation for you, this website is a good free online citation generator.