Links

http://www.bloodshed.net/download.html

www.panda3d.com

For OpenGL:
http://nehe.gamedev.net/
www.gametutorials.com
http://www.xmission.com/~nate/opengl.html
www.opengl.org
http://fly.cc.fer.hr/~unreal/theredbook/

For Flash:
http://www.flashkit.com/ www.robertpenner.com
www.ultrashock.com
www.favouritewebsiteawards.com
www.bit-101.com
http://www.9elements.com/3dengine/

For Physics:
www.myphysicslab.com
http://www.d6.com/users/checker/dynamics.htm
http://www-2.cs.cmu.edu/~baraff/sigcourse/

Misc:
http://astronomy.swin.edu.au/~pbourke/
http://www.complexification.net/
www.processing.org
www.sodaplay.net
www.gamelab.com
http://www.flipcode.com/