websites:

http://crca.ucsd.edu/~msp/techniques/latest/book-html/

http://ccrma.stanford.edu/~jos/GlobalJOSIndex.html

books:

The Computer Music Tutorial, by Curtis Roads

3rd party objects:

http://www.iamas.ac.jp/~aka/max/
http://www.music.columbia.edu/PeRColate/
http://www.jasch.ch/dl/
http://www.e—j.com/
http://www.mat.ucsb.edu/whsmith/xray.html

OSCulator:

http://www.osculator.net/wp/

max toolbox

http://code.google.com/p/maxtoolbox/