System is search engine friendly.
Turn off javascript in your browser and click here to see this page, as it is shown to search robots as well as to text based browsers such as lynx.
Turn script on again and click browser's "Refresh" button.
Windows may contain arbitrary GWT widgets
For example, those.
Code that runs inside window may be notified when window is resized or closed. It can even prevent closing when needed. Try it here.
Code inside window may write context help which is shown to the user, when he activates window. Try it here.
Classes that represent main menu model are serializable, so menu can be formed on server side.
We can't provide visible sample here, but believe us, menu of this site is made on the server side.
"Back" button of browser works smoothly with the system.
Just try it.
System supports "guard", which may test current user permissions to see one or another URL and forward browser to login or error page, when required.
Look and feel is defined by CSS and may be changed easily.