I would also look at RSReport http://www.rothsoft.ch/realbasic/rsreport/index.php?page=description
. I just used it for a project and I've been pretty happy with it so far.
Because it's not a 'banding' report generator like OTR, Valentina, Crystal Reports, etc, it's a bit more work to setup, but you have total control of where things are placed on the page. The demo app has a grid page that's impossible (AFAIK) to do in a traditional banding type reporting tool. It also has no report designer but after my first report I was able to reuse a lot of code and the rest went much quicker.
It currently lacks US Letter support but I've been told by the developer to expect a new version soon (next week perhaps). The documentation is in German but I found it fairly easy to figure out. Babelfish was my friend for a day or two.