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.
TestFlight - iOS beta testing on the fly.
Appaloosa-Store - Appaloosa helps businesses maximize the deployment of enterprise mobile apps. Deploy your enterprise app store for Apple iOS and Android apps to employees & testers.
Beta Family - 50,000 testers to test your app
Topcoder - The Topcoder home page has received a slick new makeover that lets new customers quckly login, discover the power of our community, and launch challenges.
Install On Air - Install On Air offers Testflight and Diawi Alternative for iOS and Android App. Distribute your application in less time with best platform for app distribution.