Software Design Patterns

• Overview of Design Pattern Catalogs: http://hillside.net/patterns/patterns-catalog
• Portland Pattern Repository: http://c2.com/ppr/index.html
• Open Pattern Repository: http://www.patternrepository.com/welcome.iface
• Pattern Forge: http://www.patternforge.net/wiki/index.php?title=Pattern_Repository

Educational Patterns

• Pedagogical Patterns Project: http://www.pedagogicalpatterns.org/
• Educational Patterns: http://www.educationalpatterns.org/

Human Computer Interaction

• Overview of Interaction Patterns: http://www.visi.com/~snowfall/InteractionPatterns.html
• Wiki Patterns: http://www.wikipatterns.com/display/wikipatterns/Wikipatterns
• Yahoo Pattern Library: http://developer.yahoo.com/ypatterns/
• AJAX Design Patterns: http://ajaxpatterns.org/

Pattern Languages

• Pattern language related GitHub projects: https://github.com/pattern-languages
• RESTalk pattern language: http://restalk-patterns.org/