Earth Sciences
Geosoft - Earth Mapping Software - http://geosoft.com/solutions/solutions/earth-mapping
Provider of Earth Sciences data management solutions for earth explorers, including geochemical analysis, geophysical software, 3D modelling and subsurface mapping.
USGS Publications and Data - http://www.usgs.gov/pubprod/index.html
Offers publications and other data research from the U.S. Geological Survey.