BeanUtils - BeanUtils provides an easy-to-use but flexible wrapper around reflection and introspection.
dozer - Dozer is a powerful, yet simple Java Bean to Java Bean mapper that recursively copies data from one object to another
Java Bean Library - Java Bean Utilities Library
Java Bean Library for Hibernate - Particularly handy when used with Hibernate. It allows developers to easily reuse the same pojo classes for both persistence instances and data transfer objects.
Commons JXPath - A Java-based implementation of XPath 1.0 that, in addition to XML processing, can inspect/modify Java object graphs (the library's explicit purpose) and even mixed Java/XML structures.
Commons BeanUtils Core -
Commons BeanUtils Bean Collections -