Design Patterns

http://www.netobjectives.com/design.htm
This site offers an introduction on the importance of design patterns. 

http://umbc7.umbc.edu/~tarr/dp/dp.html
This site has links to design patterns Web sites, tutorials and papers.

http://www.links2go.com/topic/Design_Patterns
This site links to sites and information on design patterns.

http://www.c2.com/ppr/
This site discusses recent advances in design patterns, as well as ideas for future projects.

http:www.objenv.com/cetus/oo_patterns.html
Patterns at Cetus links.  You'll find a wide array of pattern related links.

http://www.patternscentral.com/
A wide collection of patterns.

Design Patterns in Java

http://www.enteract.com/~bradapp/javapats.html
This site discusses Java design patterns and presents design patterns in distributed computing.

http://www.meurrens.org/ip-Links/java/designPatterns/
This site displays numberous links to resource and information on Java design patterns.

Design Patterns in C++ & Visual Basic

http://journal.iftech.com/articles/9904_shankel_patterns/
This site provides insight to design patterns (the Iterator design pattern, in particular) in C++

http://mspress.microsoft.com/prod/books/sampchap/2322.htm
This site overviews the Microsoft Visual Basic Design Patterns book.

http://www.xmlpatterns.com
This site presents how to use patterns in XML.

Architectural Patterns

http://www.javaworld.com/javaworld/jw-04-1998/jw-04-howto.html
This site contains an article discussing how the Model-View Controller architecture is integrated with Swing components.

http://compsci.about.com/science/compsci/library/weekly/aa030600a.htm
This site provides an overview the Model-View-Controller architecture.

http://www.ootips.org/mvc-pattern.html
This site provides information and tips on using MVC.

http://www.ftech.co.uk/~honeyg/articles/pda.htm
This site contains an article of the importance of architectural patterns in software.

http://www.tml.hut.fi/Opinnot/Tik-109.450/1998/niska/sld001.htm
This site provides information on architectural patterns, design patterns, and idioms.

http://www.security-patterns.de/
This site provides information on Security Patterns

Research Links

http://www.researchindex.com
ResearchIndex is a scientific literature digital library that aims to improve the dissemination and feedback of scientific literature, and to provide improvements in functionality, usability, availability, cost, comprehensiveness, efficiency, and timeliness.

http://www.vivisimo.com
Organized search results with document clustering. Search for papers, books, and other pattern related sites with ease.