Zeplin - Collaboration app for UI designers & frontend developers
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.
Pamela for Skype - A versatile and easy to use Skype audio and video recording software. Features
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
ActiveWords - Auto correct on steroids
APKMirror - Android Market and APK Downloads