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Re:Offer HN: Free licenses for two developer tools by viggity on Thursday October 28, 2010 @10:27AM (#1842984)
Mono doesn't have a WPF alternative, so no on that front. I'm not sure about WINE but I'm guessing so.
Re:Offer HN: Free licenses for two developer tools by rlmw on Thursday October 28, 2010 @11:39AM (#1843308)
Mono does have a Silverlight alternative. So if you're able to switch to Silverlight in future then that might enable to create a crossplatform version.

Best of luck.