The repository (http://c2.com/ppr/) publishes pattern languages and pattern related information. This site, the WikiWikiWeb, also contains a large amount of related material. If you are new here, please see WelcomeVisitors for an introduction.

Some useful StartingPoints:
* PatternLanguage
* CategoryPattern 
* DesignPatterns 
* CategoryAntiPattern 
* CategoryGroupsOfPatterns
* SomePatternsQuestionsAnswered