Bimage allows groups to view and generate images of infinite depth
...Bimage is targeted for Google App Engine (GAE), and uses the datastore for a backend, though it should be adaptable to other backends. This project
is set up for eclipse using the GAE plugin. The server-side of Bimage is not required for the javascript to function, but the saving of images will always fail (or can be disabled).
Follow the link below to see Bimage in action. (Best viewed on Firefox or Chrome).
UMLetino is a free online UML tool for fast UML diagrams. It runs in your browser, and does not require any installs.
It is based on UMLet (which is available as stand-alone tool or Eclipseplugin), and shares its fast, text-based way of drawing UML sketches.
Main features: install-free web app; support for many UML diagram types; simple, markup-based UML element modifications; png export.