Searches across 39 molecular and literature database maintained by NCBI (the National Center for Biotechnology Information). Results are listed by database so a single search can lead to discover of different types of data. Good for a broad overview.
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Provided by the Law Library of the Library of Congress, the Global Legal Information Network (GLIN) is a public database of official texts of laws, regulations, judicial decisions, and other complementary legal sources contributed by governmental agencies and international organizations.
Govinfo replaces the Federal Digital System (FDsys) and is a service of the United States Government Publishing Office (GPO) . It provides free public access to official publications from all three branches of the Federal Government, such as the Federal Register, the Code of Federal Regulations, the Congressional Record, Congressional bills, Congressional hearings and reports, and laws.