ISOinteractive.com has just released a new free authoring version of their ISO STUDIO. It is a reusable stand alone Collision Map Editor with external components such as an isometric engine and even behaviors to work with Macromedia Director.
There are 3 main components.
a. The CME (Collision Map Editor) stand alone application.
b. The external ISOinteractive Engine (used With Director)
c. A growing set of Behaviors (used With Director and auto installed in the Libs)
The free authoring version can export all available file formats available with in the CME applicaiton. The external engine of the free version only works in authoring mode. The full version can be developed for projectors and shockwave.