Collection of links from various United States government agencies with responsibilities for scientific information arranged according to broad topics and then alphabetically by name. Science.gov is maintained by seventeen government agencies that make up the Science.gov.Alliance.
Over the many years that the Institute of Scientific Information/Thompson Reuters has been gathering citation information it has discovered many correlations between its citation data and scientific/research information. This page links to some some of this analysis.
Intute was once a British attempt to provide a reliable index of Internet resources in the science, technology, and other areas. Due to budgetary problems it was closed to new resources or updates in July 2011l.
NIST is the United States government's official agency for weights and measures. Formerly known as the National Bureau of Standards for many years it has made sure the nation's measures were accurate for commercial dealings. Today's agency also covers scientific and technical measures and produces data collections relevant to many technical areas in compilations like the NIST Chemistry Webbook and others (many available for sale).