osddm

Oracle SQL Developer Data Modeler is a free graphical tool that enhances productivity and simplifies data modeling tasks.
Using Oracle SQL Developer Data Modeler users can create, browse and edit, logical, relational, physical, multi-dimensional,
and data type models. The Data Modeler provides forward and reverse engineering capabilities and supports collaborative
development through integrated source code control. The Data Modeler can be used in both traditional and in Cloud environments.