Zasilkovna.cz PHP library supporting SOAP and REST API + custom Label
Running JasperReports from command line
Wubiq. Printing from anywhere, everywhere.
Qt based report solution
Michel Max MMSpread is an API XLSX files without the MS Excel ins...
java API for tabular reports and pivot tables
A pure PL/SQL reporting engine (transforms jrxml to PDF)
KBarcode is a barcode and label printing application for KDE 4.
Ghost4J is a Java wrapper for the Ghostscript C API. It also provides
A free, fast and easy-to-use word processor app.
although fully functional, this is a pre-framework that you can extend