Xamarin, Adobe stuff. And I've found a Windows VM in a Linux host to be passable, though suboptimal. Especially because you only run it sporadically, so even though it's a VM you still have to deal with its compulsive and compulsory updating, restarting, and whatever else it does that keeps it busy for 20 minutes when it hasn't been started in a month.

Also Linux multi-screen/multi-DPI support is still bad.