Beta Family - 50,000 testers to test your app
TestingCatalog - TestingCatalog is a community of beta testers and developers exploring android apps and exchanging feedback.
Betatesters.io - The platform connecting mobile developers and beta testers
UTest - uTest is the world's largest professional network for software testers and test engineers - 175,000+ QA professionals from more than 200 countries and territories.
Betafy - Where startups meet beta users!
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.