I'm trying to use Balsamiq Mockups under Wine
It kind of works.
This is what it should look like (running on a Mac):
(ignore the size differences, that's just resolution of the monitors)
I'm almost 100% certain that the problem with not being able to see anything is that I must not have a font setup. But I'm not sure how to find that font, and once I've got it, where to put it.