Along these lines, I noticed recently that one of the most visually impressive iOS Anatomy apps - Essential Anatomy - came to Windows Store before coming to Google Play. Only by a couple days (so I guess they were submitted to the stores at the same time), but I was surprised nonetheless.
http://apps.microsoft.com/windows/en-gb/app/essential-anatomy-3/c62b78ce-cebb-4d7d-a319-8553cb70c7ba
Holy crap that's a freakin awesome app. I'm going to download that onto my surface pro 3.