References

Below listed are a few websites:

qgistutorials.com
spatialthoughts.com
paulbolstad.net
learnpracticalgis.com
giscommons.org
gis.stackexchange.com
spatialanalysisonline.com
gislounge.com
gis.harvard.edu
teachgis.org
ncgia.ucsb.edu
freegis.org
mapcruzin.com
gistutor.com
learninggis.com
wiki.gis.com

Reference books used to teach this course:

1. Introduction to Geographical Information Systems - Heywood, Cornelius, Carver
2. Concepts and Techniques of Geographic Information Systems 
3. - C.P. Lo, Albert K.W. Yeung
4. Textbook of Remote Sensing and Geographical Information System - M. Anji Reddy
5. Principles of Geographic Information Systems - An Introductory Textbook
6. -Rolf A. de By, Martin C. Ellis, Yola Georgiadou, Richard A. Knippers, Menno-Jan Kraak, Mostafa M. Radwan, Yuxian Sun, Michael J. C. Weir, Cees J. van Westen, Wolfgang Kainz, Edmund J. Sides
7. Geographic Information Science - Wolfgang Kainz
8. How is the real world represented in GIS - Katy Bregazzi
9. An Introduction to GIS - David J Buckley
10. Coordinate systems and Map projections for GIS - D.H. Maling
11. Remote Sensing and GIS - B. Bhatta
12. Introduction to Geographic Information Systems - Chang, Kang-Tsung
13. Fundamentals of Geographic Information Systems - Michael De Mers
14. Ten Practical Applications of Geographical Information Systems - Ian Allen
15. Understanding Map Projections - Melita Kennedy
16. Campbell JB, 2006. Introduction to Remote Sensing. New York: Guilford Press. 4th Ed
17. Longley PA, Goodchild MF, Maguire DJ and Rhind DW, 2005. 
18. Geographical Information Systems and Science. New York: Wiley. 2nd Edition
19. Longley PA, Goodchild MF, Maguire DJ and Rhind DW (eds.), 1999. 
20. Geographical Information Systems: Principles, Techniques, Management and Applications. New York: Wiley.
21. Albrecht J, 2007. Key Concepts and Techniques in GIS. London : SAGE Publications.
22. Chrisman N, 2001. Exploring Geographic Information Systems. New York: John Wiley & Sons. 2nd Edition
23. Jensen JR, 2004. Introductory Digital Image Processing: A Remote Sensing Perspective. New Jersey: Prentice Hall. 3rd edition.
24. Lillesand TM, Kiefer RW and Chipman JW, 2004. Remote Sensing and Image Interpretation. Chichester: Wiley. 5th edition.
25. Richards JA and Jia X, 2006. Remote Sensing Digital Image Analysis: An Introduction. Berlin: Springer. 4th edition.

AUTHORS:
Ian, Heywood, Cornelius
Carver
Goodchild
Bradley O. Parks
Steyart
DeMers
Dangermond


WEBSITES:
http://anitagraser.com/
http://free-gis.com/
http://www.qgis.org/en/site/
http://grass.osgeo.org/
http://www.freegis.org/
http://www.osgeo.org/
http://www.bookfinder.com

GRASS-KNOPPIX  (Bootable CD)
Asian Institute of Technology bootable CD of GIS - AIT-STAR CD
http://www.academia.edu/1436198/2004_FOSSGRASS-STARCD
http://fossgis.blogspot.in/
http://live.osgeo.org/en/index.html

This list is by no means comprehensive and is only indicative.