1. CCRS Canada Centre for Remote Sensing -http://landmap.mimas.ac.uk/ipc/ccrs/fundam_e.html
2. NASA Remote Sensing Tutorial - http://rst.gsfc.nasa.gov/
3. TELSAT, Belgium - http://eoedu.belspo.be/en/guide/index.htm
4. http://www.landsat.org/ (Free)
5. SRTM 90m Digital Elevation Data (Free) http://srtm.csi.cgiar.org/
6. Freeware MultiSpec (A Multispectral Image Data Analysis System) http://cobweb.ecn.purdue.edu/~biehl/MultiSpec/
7. Commercial ERDAS Imagine http://gi.leica-geosystems.com/LGISub1x33x0.aspx
8. PCI Geomaticshttp://www.pcigeomatics.com/
9. ENVI http://rsinc.com/envi/
10. ER Mapper http://www.ermapper.com/
11. IDRISI http://www.clarklabs.org