There is an HyperCard inspired tool that is very similar and works on Mac OS X, Windows, Linux and is able to deploy to all those platforms plus Android and iOS.
Its a wonderful tool and very easy to learn. It is also GPL.
h) For the avoidance of doubt, this [Commercial] Licensed Edition does not include access to the LiveCode engine source code found in the Community Edition. This Licensed Edition is not compatible with the terms of the GPL and such software may not be incorporated or utilized with this Licensed Edition.
Comments
There is an HyperCard inspired tool that is very similar and works on Mac OS X, Windows, Linux and is able to deploy to all those platforms plus Android and iOS.
Its a wonderful tool and very easy to learn. It is also GPL.
http://livecode.com
The only license I see on the LiveCode site is at http://livecode.com/LiveCode-EULA/ and that specifically mentions that it's not GPL-compatible.
So they've dual-licensed it. The Community Edition source on Github is all GPL with this exception: https://github.com/runrev/livecode/commit/51e3958082d9edd645...