PubChem free chemistry database
Bio Med Central registration required (free); plenty of full-text
Literature, Arts, and Medicine Database gives summaries of works
(very useful for locating art, films and literature on a particular topic)
Green File “…a freely accessible research database focusing on the relationship between human beings and the environment, with well researched but accessible information on topics ranging from global warming to recycling to alternate fuel sources and beyond” (Green File)
Tip: For full text only, use the advanced search screen and check the full text box.
BASE—Bielfeld Academic Search Engine a multidisciplinary search engine that functions as a database of scholarly information available on the InternetTeacher Resource Center