xTuple's Free Open Source SQL Report Writer
As part of all three Editions of xTuple, built with the PostgreSQL database and the Qt GUI client framework, we built our own SQL report writer from scratch. It runs equally well on Windows, Linux, and Mac OS X. We call it OpenRPT.
Download OpenRPT from our SourceForge project site. OpenRPT is released under the GNU Lesser General Public License. You are free to use it as you wish; if you would like to purchase commercial support or embedded licenses, please see below.