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.
Ninite - Ninite is the easiest way to install software.
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
MacUpdater - MacUpdater - keep all your apps up-to-date effortlessly
APKMirror - Android Market and APK Downloads
Sumo - Free tools to grow your email list.