I was looking at Google Apps Gallery and came across this ER modeling tool which is very cool and I decided to blog about it.
The tool is called GAE SQL Designer and is done by Jason W. Miller. It is an ER modeling tool on the web! All you need is a browser and you start modeling databases, with no installs and no extra software. You can access it directly here http://gaesql.appspot.com/
Excellent, I liked the idea very much! One thing that is missing is the ability to generate SQL from your data models. There is another less intuitive google app for that here: http://code.google.com/p/wwwsqldesigner.
Apart from that, I think Jason's GAE SQL Designer will be useful in quick prototyping and learning. Well done Jason!