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.
OCS inventory NG - OCS inventory NG is a free software that enables users to inventory IT assets.
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
StackPile - StackPile is a web-based app that helps you easily integrate third-party software into your existing or new website.
APKMirror - Android Market and APK Downloads
Moment Timezone - Moment Timezone enables the user to parse and display dates in javascript for any timezone.