Google Play (formerly the Android Market) is an online store by Google for Android devices. Browse and search for apps, books, and movie rentals from your web browser or Android device.
Aptoide is a distributed marketplace for mobile applications which runs on the Android operating system. In Aptoide, unlike the default Google Play Store, there is not a unique and centralized store but each user manages their own store.
APKPure is a totally free APK downloader for Android phone and tablet. Download apk directly from Android market even without Google play store account.
In an effort to make things easy, and maybe even fun, AndroidPolice.com created APK Mirror. Over the past several months, they've been working to build a smooth, reliable, trust-worthy site to host the downloads users love.
Uptodown is an international download site for mobile apps and desktop software. It was created on December 20, 2002, and is based in Málaga, Spain.
The project's aim is to promote free and open source software on the Android platform. AndroBranch organizes apps in an attractive, Google Play-like arrangement with the ability to view apps by popularity.