2. Android SecretcodesSecret Codes is an Open Source application that allows you to browse through hidden codes of your Android phone.
5. Android InstallreferrerInstall Referrer is an Open Source application that allows you to test the referrer attribute on the Google Play Store
9. Android-SpansKotlin and Java wrappers around SpannableStringBuilder (Inspired by JakeWharton's Truss and Kotlin's kotlinx.html)