Mobile Apps Testing

Android

http://bitbar.com/top-5-android-testing-frameworks-with-examples/
https://developer.android.com/training/testing/index.html
https://google.github.io/android-testing-support-library/
https://google.github.io/android-testing-support-library/docs/espresso/setup/index.html

Expresso on Device Farm

https://github.com/awslabs/aws-device-farm-sample-app-for-android

iOS

http://bitbar.com/top-5-ios-testing-frameworks-with-examples/