Some useful links for Robotics enthusiasts.....

Best resources:
http://www.roboticsindia.com
http://www.societyofrobots.com
http://www.ikalogic.com
http://www.beyondlogic.org

Odometry & Dead Reconing (Line tracker):

http://rossum.sourceforge.net/papers/DiffSteer/DiffSteer.html
http://www.seattlerobotics.org/encoder/200108/using_a_pid.html
http://www-personal.engin.umich.edu/~johannb/
http://elm-chan.org/works/ltc/report.html

Micromouse :

http://www.micromouseinfo.com

http://micromouse.cannock.ac.uk

http://madan.wordpress.com/2006/07/24/micromouse-maze-solving-algorithm/

Shaft Encoders
http://members.cox.net/rbirac2/Ebot/using_encoder.htm
http://www.seattlerobotics.org/encoder/200010/dead_reckoning_article.html

Stepper Motors / Parallel Port / Microcontrollers / LCD (for both autonomous)

http://www.doc.ic.ac.uk/~ih/doc/

Practical fundamentals for robot building

http://www.robotroom.com/
http://www.cs.dartmouth.edu/~robotlab/robotlab/courses/cs54-2001s/locomotion.html
http://www.howstuffworks.com/gear.htm
Microcontrollers

http://www.8052.com/
http://winavr.sourceforge.net/
http://hubbard.engr.scu.edu/embedded/avr/avrlib/
http://www.beyondlogic.org/serial/serial.htm

Line follower

http://elm-chan.org/works/ltc/report.html
http://www.kmitl.ac.th/~kswichit/LFrobot/LFrobot.htm
http://www.seattlerobotics.org/encoder/200005/jeffspencer.html

IP
http://exaflop.org/docs/cgafaq/
http://www.cs.cmu.edu/~cil/v-related.html
http://www.ph.tn.tudelft.nl/Courses/FIP/noframes/fip-Contents.html
http://axon.physik.uni-bremen.de/online_calc/

Opencv tutorial
http://www.site.uottawa.ca/~laganier/tutorial/opencv+directshow/

Game Programming and AI

http://www-cs-students.stanford.edu/~amitp/gameprog.html
http://chess.verhelst.org/about/
http://www.ast.cam.ac.uk/~cmf/chess/colchess/index.htm