Database Designer on the web. It’s possible?

I have just found amazing web application on the web.
It’s database ERD designer.

I was looking for this a long time and now I have found it:-)

http://ondras.zarovi.cz/sql/demo/?keyword=default

Thanks for this to Ondřej Žára

P.S. You can download this application and create your own database of your ERD or import it from database:-)