Search for journal articles on most topics. This multi-disciplinary database is a good place to start if you don't know where else to begin. (EBSCO)
Search across over 20 Gale Primary Sources archives, including Archives of Sexuality and Gender, Archives Unbound, The Making of Modern Law, and various historical newspapers and magazines. (Gale)
Search a catalog of library holdings from around the world. Find which libraries have copies of a certain book, DVD, or other material. The FirstSearch interface was designed more with librarians in mind. (OCLC)