I have put up the open source reporting application ReportsAnywhere at www.reportsanywhere.com .
ReportsAnywhere is a full featured reporting system, that is designed compete on a feature by feature basis with any commercially available reporting or publishing software.
It has some unique features like the ability to create reports directly from Java classes and its support for complex XML and for NoSQL databases. Of course it also supports relational database access via SQL.
Another unique feature is the ability to create highly complex documents for publishing from database data.
Commercial support is available for ReportsAnywhere. It is published with the Gnu Public License and offers commercial licenses for embedding ReportsAnywhere in commercial applications.