A commercial multi-platform multimedia authoring tool and GUI development environment, and yet so much more!

''.... so much more expensive.''

http://www.metacard.com

The MetaCard engine technology has been acquired by RuntimeRevolution. 
Similar software can be found starting at:
* http://newserver.runrev.com/developers/getting-started/
Developers might be interested in:
* http://newserver.runrev.com/developers/moving-to-revolution/c-and-java/
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CategoryHypercard