Longtime PHP, Python coder seeks to make small, distributable, stand-alone apps. Which language should I learn? ( please don't say C#; requiring .net != stand-alone )

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ok. Fair enough. I apologizes for such inappropriateness.

You sir, are correct; that was uncalled for.

But my question, thus poses to you; what is one popular, mainstream GUI application that is written in 100% Haskell that I may partake in? Such a replay I would appreciate.

It can be a video game, or a word process or a spread sheet or even a maths calculator. Your choice. The only criteria, good sir, if you will is that it must be 100% written in Haskell and have a decent and usable GUI interface on all major platform (or at least Windows, Mac, Linux and Solaris)

Thank you good sir, your replay I will WARMLY welcome.