Free Databases (all subjects): Technology

Contains citations, abstracts and some full-text of articles published by the Association for Computing Machinery. A free account is required to search, use binders, and retrieve full-text articles, although no registration is required to browse tables of contents. Coverage: 1985-present.

Scientific Literature Digital Library hosted by Penn State

This "collection of bibliographies of scientific literature in computer science" contains more than 2 million citations, about half with links to full text.

Free, full text journals, mostly in the sciences.

Provides access to citation, abstracts, and some full text of unpublished and difficult-to-find technical reports from several different U.S. government agencies (including the Department of Defense, Department of Energy, NASA and the Environmental Protection Agency) with a single search.

This "free-access online bibliographic database on Human-Computer Interaction" includes more than 29,000 links and citations.

"Science.gov is a gateway to authoritative selected science information provided by U.S. Government agencies, including research and development results."