Apache Cordova - Platform for building native mobile applications using HTML, CSS and JavaScript
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.
React Native - A framework for building native apps with React
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
PhoneGap - Easily create apps using the web technologies you know and love: HTML, CSS, and JavaScript.
APKMirror - Android Market and APK Downloads