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)