Java EE real world open source applications [closed]

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What are good Java EE real world (not like learning projects like PetStore) open source applications? In particular I'm looking for examples of using ORM (JPA-Hibernate), Spring (IoC, transaction managment, security) in a real world environment

ps a good example what I'm looking for - ASP.NET starter applications (for .net platform)

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Alfresco uses Spring/Hibernate. I believe OpenNMS does as well.

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The Java EE 6 homepage has several samples: Java EE 6 Sample Applications. Further there's the Appfuse which gives you the possibility to compose a kickoff Java EE application together yourself.

Update: I realize that you're rather looking for an overview of all "3rd party" open source Java EE based ecommerce/business/CMS systems. You can find pretty complete overviews at Java-Source.net. For example all ERP-CRM systems and CMS systems.

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Found myself looking for a substantial demonstration of JPA. I came accross a CRM tool called "BroadLeaf Commerce", built on Spring and JPA. It's available on github, personally I've found it to be an invaluable learning tool with respect to JPA.

http://www.broadleafcommerce.org/