Astrophysics Data System The SAO/NASA Astrophysics Data System (ADS) is a Digital Library portal for researchers in Astronomy and Physics, operated by the Smithsonian Astrophysical Observatory (SAO) under a NASA grant. The ADS maintains three bibliographic databases containing more than 10.7 million records.
Crystallography Open Database "Open-access collection of crystal structures of organic, inorganic, metal-organic compounds and minerals, excluding biopolymers."
David Rumsey Map Collection "The Map Database has many viewers and the Blog has numerous categories. The physical map collection is housed in the David Rumsey Map Center at the Stanford University Library. The historical map collection has over 75,000 maps and images online. The collection includes rare 16th through 21st century maps of America, North America, South America, Europe, Asia, Africa, Pacific and the World."
figshare Discover research archived by institutions and by individuals. Use the search box at the top of the window to locate research on your subject.
Frontiers Frontiers is an open science publisher of about 60 journals, but the real strength in this site is that articles are brought together under about 800 research topics further organized into subtopics so that they users can easily catch up on current research. The articles in each subtopic can then be downloaded as a PDF eBook or read online. All articles are licensed CC-BY.
MERLOT "MERLOT is a curated collection of free and open online teaching, learning, and faculty development services contributed and used by an international education community."
NASA Technical Reports Server "Over 500,000 aerospace-related citations, over 200,000 full-text online documents, and over 500,000 images and videos are available in the three collections that are integrated in NTRS"
National Science Digital Library "The National Science Digital Library provides high quality online educational resources for teaching and learning, with current emphasis on the sciences, technology, engineering, and mathematics (STEM) disciplines
SAO/NASA Astrophysics Data System "The SAO/NASA Astrophysics Data System (ADS) is a Digital Library portal for researchers in Astronomy and Physics, operated by the Smithsonian Astrophysical Observatory (SAO) under a NASA grant. The ADS maintains three bibliographic databases containing more than 10.2 million records."
Science.gov Provides links to a wide variety of scientific resource materials, indexes, and statistics produced by U. S. departments, agencies, and related institutes and labs.
ScienceCinema Highlights leading-edge research from the U.S. Department of Energy as well as the European Organization for Nuclear Research (CERN). Using innovative, state-of-the-art audio indexing and speech recognition technology from Microsoft Research, ScienceCinema allows users to search for specific words and phrases spoken within video files. Simply enter a term in the box and start exploring!
US Fire Statistics The U.S. Fire Administration (USFA) collects data from a variety of sources to provide information and analyses on the status and scope of the fire problem in the United States.
Wiley Open Access Journals "Wiley Open Access publishes authoritative peer reviewed open access journals across many research disciplines."
Yale Digital Content "Search nearly two million items and half a million images from across Yale's collections." Find Yale online courses, and museum items. Some content subject to copyright -- be sure to check.