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PLoS ONE: an inclusive, peer-reviewed, open-access resource from the PUBLIC LIBRARY OF SCIENCE. Reports of well-performed scientific studies from all disciplines freely available to the whole world.

SpringerImages provides a new way to access hard-to-find scientific content of the utmost value to researchers: images.

SkyVector is the most popular way to view aeronautical charts online. Always current, and always free, FAA Sectional Charts are used for VFR flight planning anywhere in ths US. Terminal Area Charts cover only areas around major Class B Airports. They...

MathWorks is the world’s leading developer of technical computing software for engineers and scientists in industry, government, and education

Nature - the world

IOPscience is a unique platform for IOP-hosted journal content providing site-wide electronic access to more than 130 years of leading scientific research, and incorporates some of the most innovative technologies to enhance your user-experience.

Scientific Literature Digital Library incorporating autonomous citation indexing, awareness and tracking, citation context, related document retrieval, similar document identification, citation graph analysis, and query-sensitive document summaries. ...