TestFlight - iOS beta testing on the fly.
TestApp.io - A platform that helps both mobile app developers and owners to easily share their apps with everyone to get feedback before reaching publicly to Google and App stores.
TestFairy - Painless Beta Testing
AppHost - Free iOS and Android (IPA and APK) app hosting for enterprise and internal mobile apps.
Appforshare.io - Extended Expiry | Extended Size | Extended Storage
Visual Studio App Center - Continuous everything – build, test, deploy, engage, repeat