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More java framework and APIs that I have been using.

you can find the first part this article here: java runtime stack

lucene

java text indexing framework. you can use it either with hibernate search or with a standalone server over web service -Solr or your own implementation

apache-commons

• commons-lang
• beanutils
• logging
• commons-io

really for enhancements for JDK lots and lots of utility methods and classes,

jaxb

java XML binding java official API . If your are starting from XSD it is an amazing API.  just with annotation

it is clear and over. more jaxb article

you may choose castor or jibx of course they have very little difference  but jaxb is a JCP on the other hand jaxb has a code generation over XSD dependency which can be some times painful

Groovy

for your changing script,rules vs.,

instead of writing lots constants and if clauses for a set some business rules use some dynamic scripting.

competitor: java rule engines may be for large projects but groovy is more easy and manageable

Joda-Time

easy date time operations and support for hibernate, A good replacement  for the troublesome java date API.

All additions and suggestions are welcome

have a nice day

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