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Linda Rising's [http://www.smallmemory.com/almanac/ Patterns Almanac 2000] (0201615673) provides a brief description of a large catalog of patterns from various authors.
Floyd Marinescu's EJB Design Patterns: Advanced Patterns, Processes, and Idioms (0471208310) is available as a [http://www.theserverside.com/books/wiley/EJBDesignPatterns/downloads/ejbdesignpatterns.pdf pdf], but I haven't yet found an online list of the patterns.
Alur, Crupi, and Malks' [http://www.corej2eepatterns.com/Patterns2ndEd/index.htm visual catalog] from Core J2EE Patterns (0131422464)
Hillside.net [http://hillside.net/patterns/onlinepatterncatalog.htm Patterns Catalog] or meta-catalog
See also RefactoringCatalog as many refactorings lead toward patterns.