The following are all distributed under the Apache 2.0 (http://apache.org/licenses/LICENSE-2.0.html) licence:
Android Multi Dex Library - https://maven.google.com/web/index.html#androidx.multidex:multidex
Android AppCompat Library - https://maven.google.com/web/index.html#androidx.appcompat:appcompat
Android ConstraintLayout - https://maven.google.com/web/index.html#androidx.constraintlayout:constraintlayout
Core Kotlin Extensions - https://maven.google.com/web/index.html#androidx.core:core-ktx
Legacy Support V4 - https://maven.google.com/web/index.html#androidx.legacy:legacy-support-v4
Android Support RecyclerView - https://maven.google.com/web/index.html#androidx.recyclerview:recyclerview
Android Support Custom Tabs - https://maven.google.com/web/index.html#androidx.browser:browser
Android Lifecycle ViewModel Kotlin Extensions - https://maven.google.com/web/index.html#androidx.lifecycle:lifecycle-viewmodel-ktx
Android Preferences KTX - https://maven.google.com/web/index.html#androidx.preference:preference-ktx
Material Components For Android - https://maven.google.com/web/index.html#com.google.android.material:material
Firebase Firestore KTX - https://maven.google.com/web/index.html#com.google.firebase:firebase-firestore-ktx
Firebase Config KTX - https://maven.google.com/web/index.html#com.google.firebase:firebase-config-ktx
Firebase Crashlytics - https://maven.google.com/web/index.html#com.google.firebase:firebase-crashlytics
Firebase BOM - https://maven.google.com/web/index.html#com.google.firebase:firebase-bom
Google Services Gradle Plugin - https://maven.google.com/web/index.html#com.google.gms:google-services
Firebase Crashlytics Gradle - https://maven.google.com/web/index.html#com.google.firebase:firebase-crashlytics-gradle
Android WorkManager Runtime - https://maven.google.com/web/index.html#androidx.work:work-runtime
The following are all distributed under the Android Software Development Kit (https://developer.android.com/studio/terms.html) licence:
Billing - https://maven.google.com/web/index.html#com.android.billingclient:billing
Play Services Ads - https://maven.google.com/web/index.html#com.google.android.gms:play-services-ads
Play Services Base - https://maven.google.com/web/index.html#com.google.android.gms:play-services-base
Firebase Core - https://maven.google.com/web/index.html#com.google.firebase:firebase-core
Firebase Analytics KTX - https://maven.google.com/web/index.html#com.google.firebase:firebase-analytics-ktx
https://github.com/google/gson
Distributed under the Apache 2.0 (http://apache.org/licenses/LICENSE-2.0.html) licence.
Kotlin Gradle Plugin, Kotlin Stdlib Jdk7
Distributed under the Apache 2.0 (http://apache.org/licenses/LICENSE-2.0.html) licence.
https://greenrobot.org/eventbus/
Distributed under the Apache 2.0 (http://apache.org/licenses/LICENSE-2.0.html) licence.
https://github.com/Gericop/Android-Support-Preference-V7-Fix
Distributed under the Apache 2.0 (http://apache.org/licenses/LICENSE-2.0.html) licence.
https://github.com/saket/Better-Link-Movement-Method
Distributed under the Apache 2.0 (http://apache.org/licenses/LICENSE-2.0.html) licence.