Warning 17 January 2010.
VisioModeler is no longer available from the Microsoft website.
Microsoft have confirmed that VisioModeler has been archived.
This file explains the procedure that used to work for getting to the Microsoft website from where you can get a FREE download of the old VisioModeler ORM tool. VisioModeler is not supported. The download contained a useful guide to FORML - the original ORM language.
The FORML notation is now superseded by the ORM2 notation. Some of the changes are cosmetic but ORM2 also includes new features that are not available in ORM1. Terry Halpin's 2008 book "Information Modeling and Relational Databases: Second Edition" (see home page) describes ORM 2 which is implemented in the new NORMA tool.
Note - VisioModeler does not run under Vista.