SQLEditor 1.7

A Database design and entity relationship diagram (ERD) tool for Mac OS X.
SQLEditor replaces typing SQL by hand with dragging, dropping and clicking.

It makes creating databases much faster and really helps reduce errors.
If you already have a database then SQLEditor can help you see what it looks like by creating a diagram of it.
Key Features
Visual editing, including drag and drop
Live source view - the SQL source changes as you edit the diagram
Ruby On Rails Migrations - SQLEditor can export them and now (in v1.4) import them too!
With SQLEditor's reverse engineering you can import existing databases to diagram and SQLEditor will create an ER diagram for you.
Once you've created your diagram you can export it directly via JDBC to one of several supported database systems including Postgresql, Oracle.