Design Links to lookout

What are the design pages one has to lookout for understanding design?

http://www.oodesign.com/

http://www.mindview.net/Seminars/ThinkingInPatterns/

J2EEPatterns:

http://www.corej2eepatterns.com/Patterns2ndEd/

PEAA:
http://martinfowler.com/eaaCatalog/