Android market alternative (Blackmarket Alpha)

This is a great alternative for the android market , because of its huge collection of apps and games i actually prefer this over the play store.It doesn't look all that great but  you can get paid apps for FREE with it . The app also comes with a backup feature That lets you backup your apps.Also when you download an app its apk gets saved to your memory (this lets you re install the app or share the app )unlike the play store in which the apk is downloaded ,installed and deleted.