GenDBM Tool
A generic modeling tool for both relational and geographical databases
...Actually, it is provided graphical environments for: ER (relational) and OMT-G, using OMT-G Design (geographical). The Tool is a set of plug-ins for Eclipse.
We recommend Eclipse Modeling Tools (Juno or Kepler versions). To install the tool, just unzip the downloaded file and copy all the files to your eclipse's plugins folder. After that, it is possible to create a new diagram in New->Other->Gendbmtool Diagram.
We are still constructing this page. Soon, several tutorials will be available.
Contact us anytime you wish. Regards.