The Federal Government offers many free databases that search journal articles, conference proceedings, books, etc.
This database searches over 55 databases and over 2100 selected websites from 13 federal agencies, offering 200 million pages of authoritative data, including research and development results. There is also an all-Spanish version Sciencia which has the same breadth and depth of the research as the English database.
ERIC provides unlimited access to more than 1.3 million bibliographic records of journal articles and other education-related materials. If available, links to full text are included. Within the ERIC Collection, you will find records for journal articles, books, conference papers, technical reports, policy paper and other education-relation materials.
The NTRS is a valuable resource for students, educators, researchers, and the public for access to NASA's current and historical technical literature since it was first released in 1994. NTRS provides access to approximately 500K aerospace related citations, 90K full-text online documents, and 111K images and videos. The type of information found in NTRS include: conference papers, images, journal articles, photos, meeting papers, movies, patents, research reports, and technical videos.
The PLANTS Database provides standardized information about the vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories. It includes names, plant symbols, checklists, distributional data, species abstracts, characteristics, images, crop information, automated tools, onward Web links, and references.
MedlinePlus brings together authoritative information from National Library of Medicine, the National Institutes of Health (NIH), and other government agencies and health-related organizations. MedlinePlus gives easy access to medical journal articles, also extensive information about drugs, an illustrated medical encyclopedia, interactive patient tutorials, and latest health news.
This international marketing database provides statistics and background information for marketing research. Some of the sources require a login and password, which are free once a researcher is registered.
NAL Catalog--Agricultural resources
PDQ-NCI's Comprehensive Database Database of cancer information, produced by the National Cancer Institute
NIH RePORTER --A database of federally funded biomedical research projects conducted at universities, hospitals, and other research institutions
ASSIST Database of Specifications and Standards from the Department of Defense
Federal Reserve--Fed in Print: An Index to Federal Reserve Economic Research
GAO Reports--General Accounting Office. Online Via FDSys
govinfo--variety of resources providing access to U.S. government information
Catalog of US Government Publications Catalog of government publications produced since the 1870s. Contains many full-text links.
GPO Online Bookstore--Government publications for sale from GPO
GovSpot.com Provides links to government information on a wide variety of topics.
NARA Archival Research Catalog Tool for finding archival information with the National Archives and Records Administration.
Search the web sites of non-profit government-related organizations