EspressReport Lite (Free)
EspressReport Lite is a Java report development tool kit. It comes with a powerful, high performance reporting engine and a visual report builder. You can easily build embedded reporting functionality into your web based or standalone applications.
It provides the same capabilities as EspressReport except that sub-reports, drill-down, embedded charts and scheduling are not supported.
You can distribute the reporting engine to your end users free of charge. However, technical support is not included.