The Indie Gala - Buy a bundle of games, you decide the price, and support charity in the process.
APK Pure - Download apk for Android with APKPure APK downloader. NoAds, Faster apk downloads and apk file update speed. Best of all, it's free
Humble Bundle - Buy a bundle of games, you decide the price, and support charity in the process.
APKMirror - Android Market and APK Downloads
Fanatical - Buy awesome games. Pay a fraction of the retail price!
Mobango - Mobango is an alternative Android market.