Benerator – test data generator
While looking for some nice free test data generator for Firebird, I just stumbled into Benerator:
http://databene.org/databene-benerator/
benerator supports you in performing realistic load and performance tests. It is a framework for generating realistic and valid high-volume test data for your system under test (avoiding the Datalite anti-pattern)
Apparently, it works with Firebird:
http://databene.org/databene-benerator/faq/80-which-systems-does-benerator-support.html