Brando Phone Speaker - A tiny speaker that fits into your phone's headphone jack
F-Droid - F-Droid is an interesting alternative for Android users who want to try something different and not have to use the Goole Play store all the time.
Aurora - Download apks from Google Play Store
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
AIMP - AIMP : Free Audio Player : Официальный сайт программы
APKMirror - Android Market and APK Downloads