The easiest way to know what you can redistribute (royalty free) with your application is to look at the files in the Redistribution folder of the installation:
C:\Program Files (x86)\Gibraltar Software\VistaDB 6\Redist
These folders include all of the files that can be redistributed.
You may redistribute the Data Migration Wizard for use in your application (not as a stand alone tool or product).
At this time VistaDB Data Builder can't be redistributed with your product; it requires a license key and will activate on each computer where it is run.