I'm sitting here trying to use an awful application supplied by one of our vendors that's written in wxPython. It got me thinking, are there any desktop applications not written in C/C++ that you use? Are there any not written in C/C++ that you'd pay for?
I think Windows Live Writer is all in C#, and that's not bad. I wouldn't pay for it, of course. Paint.NET... but again, would you pay for it?
Can't think of many in the .NET or Java worlds. Even Eclipse and Azureus require a C++ UI component, the SWT, to be acceptably usable Java applications.