Another option for those users who don't wish to use Photoshop. Affinity is now being beta tested on Windows.

Hands-on: Affinity Photo for Windows by Jose Antunes - ProVideo Coalition (http://www.provideocoalition.com/hands-affinity-photo-windows/)

It's now available as a release version without a subscription, just a straight purchase model.

www.provideocoalition.com/affinity-photo-windows-now-available/

This has all features of the Mac version.