I myself still use ruby-gtk / ruby-gnome.

What got me into it is actually the nice documentation and the many 
examples.

I am a slow learner and I absolutely need documentation.

What ruby-gtk would need would be more ruby guys with good knowledge in 
C. I would have the time to help but unfortunately my C knowledge just 
is not good enough to really send in patches and help the maintainers. 
:(

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