The JasperReports Open-Source License

JasperReports is licensed under the Lesser GNU Public License (LGPL). This license was chosen for JasperReports since, unlike the GPL, it allows JasperReports to be used in both open-source and closed-source applications. Applications linking to the JasperReports Java class library do not need to be open-source. However, if you consider making modifications to the existing JasperReports source code, then your modifications will have to be released under the LGPL. See http://jasperreports.sourceforge.net/license.html for the complete license.