Links to free data
USGS Global Visualization Viewer
USGS provides a viewer in order to find and download free satellite data (Landsat, Terra ASTER, Earth Observing-1...).
Astrium Geo-Information Services
Astrium GEO-Information Services provides TerraSAR-X data for evaluation purposes.
NASA Jet Propulsion Laboratory
Jet Propulsion Laboratory provides AVIRIS hyperspectral data for evaluation purposes.
Global Land Cover Facility
The Global Land Cover Facility (GLCF) provides earth science data and products to help everyone to better understand global environmental systems.
ASTER Global Digital Elevation Model
The Ministry of Economy, Trade and Industry of Japan (METI) and the National Aeronautics and Space Administration (NASA) developped ASTER Global Digital Elevation Model (ASTER GDEM), a DEM data which is acquired by a satellite-borne sensor "ASTER" to cover all the land on earth.The data are distributed free of charge for scientific purposes.
Links to open source software
BEAM is a platform facilitating a quick and easy development of great tools for the analysis and processing of Earth observation data.
The Next ESA SAR Toolbox (NEST) is a user friendly open source toolbox for reading, post-processing, analysing and visualising radar data (ERS-1 & 2, ENVISAT Sentinel-1, JERS-1, ALOS PALSAR, TerraSAR-X, Radarsat-2 and Cosmo-Skymed).
Integrated Land and Water Information System (ILWIS) is an open source software for remote sensing data processing and GIS analysis.
ESA Earth Observation Principal Investigator Portal
Intitute of Geology and Mineral Exploration, Greece.