Cogprints archive of scholarly work in psychology, neuroscience, linguistics, computer science, philosophy, biology | browse by year, subject, advanced search | scholars register for an account
Houghton Mifflin College - Students Home class materials, textbook sites, lecture outlines, ACE Self Tests, study aids | Accounting, Business, Business Comm, Chemistry, College Survival (now Student Success), Communication, Developmental English, Economics, Education, English, English as a Second Language, Geology, History, Humanities, Management, Marketing, Mathematics, Physical Science, Political Science, Psychology, Student Success, World Languages
OAIster metasite indexes Open Archive Initiative print & non-print collections from 700+ institutions
ScienceResearch.com "a free, publicly available web portal allowing access to numerous scientific journals and public science databases" | astronomy, biology, chemistry, computers, environmental sciences, engineering, health & medicine, materials science, mathematics, physics, social sciences, links
NYPL Digital Gallery "NYPL Digital Gallery provides access to over 275,000 images digitized from primary sources and printed rarities in the collections of The New York Public Library, including illuminated manuscripts, historical maps, vintage posters, rare prints and photographs, illustrated books, printed ephemera, and more" | Searchable, browsable by name & subject
Yotophoto search engine for free-to-use stock photographs, indexes sources of free imagery on the web incl Flickr, Wikipedia, Stock.Xchng, Morguefile, Pixelperfect Digital, OpenPhoto
Periodicals.net indexes 97,000 publications online | searches by keyword, title, subject, ISSN, coverage type (full, abstract, index) and vendor | vendor/title list with dates of coverage & link to homepage