Hopefully this could become a sticky in this category, but I am starting a list of links that are useful when programming in OS X. This is what I have found so far:
Websites
http://developer.apple.com
http://cocoadevcentral.com/
http://www.cocoadev.com/index.pl
http://macdevcenter.com/
http://www.maczealots.com/
http://www.stepwise.com/
http://www.idevgames.com/
http://www.createmacgames.org/
http://www.xcodeforums.com/
http://macscripter.net/
http://www.sourceforge.net
http://cocoaprogramming.net/
http://java.sun.com
http://www.mindview.net/
http://developer.apple.com/referencelibrary/GettingStarted/GS_Java/index.html
http://www.cafeaulait.org/
http://java.sun.com/j2se/1.4.2/docs/api/overview-summary.html
Books
Cocoa Programming for Mac OS X
Hillegass, ISBN 0321213149
Programming in Objective - C
Kochan, ISBN 0672325861
http://cprog.oreilly.com/
http://java.oreilly.com/
Websites
http://developer.apple.com
http://cocoadevcentral.com/
http://www.cocoadev.com/index.pl
http://macdevcenter.com/
http://www.maczealots.com/
http://www.stepwise.com/
http://www.idevgames.com/
http://www.createmacgames.org/
http://www.xcodeforums.com/
http://macscripter.net/
http://www.sourceforge.net
http://cocoaprogramming.net/
http://java.sun.com
http://www.mindview.net/
http://developer.apple.com/referencelibrary/GettingStarted/GS_Java/index.html
http://www.cafeaulait.org/
http://java.sun.com/j2se/1.4.2/docs/api/overview-summary.html
Books
Cocoa Programming for Mac OS X
Hillegass, ISBN 0321213149
Programming in Objective - C
Kochan, ISBN 0672325861
http://cprog.oreilly.com/
http://java.oreilly.com/