Here is an interesting tool: http://www.viewtier.com/products/devenv/index.htm

Eclipse is a great tool to develop Java applications. Take a look here for tips, tricks and tutorials. http://accessdataonline.com/node/java/eclipse

Xalan-J:
http://xml.apache.org/xalan-j/getstarted.html

Agile development is not strictly for Java, but...
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