I've tried out nearly every (affordable or free) ER tool that's available and so far the one I like the most is DB-Main (http://www.db-main.com/doc.php?id=to1&lang=2). Which is not mentioned on the page above.
which btw, is a nice program, written in java, but no linux/mac osx version/package available. what a shame.
correction, it's c++ program. But doesn't seem to work with wine here. A shame.
