Try Caligra Workbench
A real Workbench desktop, yours for ten minutes. Nothing you do in it is kept: the machine is thrown away when the time is up.
We keep your email address, the time, and your IP address so we can stop one person taking every desktop. Sessions can be watched by a Caligra operator while they are running. Nothing inside the desktop is kept: the machine is destroyed when your time is up. To have your address removed, write to privacy@caligra.com.