DigitalGlobe

Digital Globe is a known commericial provider of  high resolution imagery.

For more info: DigitalGlobe

Latin America and Caribbean

Agustin Codazzi Geographic Institute (IGAC)
Argentinian National Space Activities Commission (CONAE)
Federal University of Santa Maria (UFSM)
Mexican Space Agency (AEM)

Africa

Algerian Space Agency (ASAL)
National Space Research and Development Agency (NASRDA)
Regional Center for Mapping of Resources for Development (RCMRD)
South African National Space Agency (SANSA)

Asia

Asian Disaster Reduction Center (ADRC)
Asian Institute of Technology (AIT)
Earth and Planetary Image Facility (EPIF)
International Centre for Integrated Mountain Development (ICIMOD)
International Water Management Institute (IWMI)
Iranian Space Agency (ISA)
National Center for Space Research and Technology (NCSRT)
National Research and Innovation Agency (BRIN)
Space and Upper Atmosphere Research Commission (SUPARCO)
Wuhan University (WHU)

Northern America

Center for Interdisciplinary Geospatial Information Technologies (GIT)
United Nations University Institute for Water, Environment and Health (UNU-INWEH)

Europe

Center for Remote Sensing of Land Surfaces (ZFL)
ERATOSTHENES Centre of Excellence (CoE)
GRID-Arendal
Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing (IAASARS/NOA)
Romanian Space Agency (ROSA)
Russian Agency for Support and Coordination of Russian Participation in International Humanitarian Operations (EMERCOM)
Space Research Institute of the National Academy of Sciences of Ukraine and National Space Agency of Ukraine (SRI NASU-SSAU)
University of Lancashire