Ubuntu for my desktop and Windows 8/Ubuntu for my laptop. To be honest, I only use Windows because I have to (for my courses). I find Linux a lot easier to work with.
iOS 9.2 on my iPhone. iOS 9.1 on my iPad. I used to have Windows 10 on my craptop, but it broke, my uncle fixed it, but when he sent me it, the mail company lost the package of the laptop, so it's gone. But I'll b getting 300 euros if they can't find it. c;