Chocolatey - The sane way to manage software on Windows.
5play.ru - 5play.ru enables you to download highly-rated Apps and Games for Android devices.
AppCake - AppCake is a website and mobile app that gives you a place to download apps for your iPhone from. The site features all sorts of apps, from games to productivity based apps. Read more about AppCake.
iOSGODS! - iOSGODS!
Microsoft Store - A world of apps in the Microsoft Store.
Altstore - A home for apps that push the boundaries on iOS