- Google Gson (Utility) 
              A Java serialization/deserialization library to convert Java Objects into JSON and back.
 
            - Android Support v4 (Development Framework) 
              The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see 
Understanding the Android Support Library.
 
            - AndroidX Activity (Utility) 
              provides the base Activity subclass and the relevant hooks to build a composable structure on top.
 
            - Android Jetpack Annotations (Utility) 
              library that contains the annotations for Android Jetpack.
 
            - Arch (Utility) 
              helper for other arch dependencies, including JUnit test rules that can be used with LiveData.
 
            - AppCompat (Utility) 
              support newer Android features on older Android versions.
 
            - Asynclayoutinflater (UI Component) 
              AndroidX library to inflate layouts asynchronously to avoid jank in the UI.
 
            - Browser (Utility) 
              display webpages in the user's default browser.
 
            - Cardview (UI Component) 
              AndroidX library to implement the Material Design card pattern with round corners and drop shadows.
 
            - Android Support Library collections (Utility) 
              standalone efficient collections.
 
            - Concurrent (Utility) 
              AndroidX library to help move tasks off the main thread with coroutines and take advantage of ListenableFuture.
 
            - Constraint Layout Library (Utility) 
              library to reduce the number of nested views needed.
 
            - Coordinatorlayout (UI Component) 
              AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton.
 
            - Androidx Core (Utility) 
              a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
 
            - AndroidX Cursor Adapter (Utility) 
              static library support version of the framework's CursorAdapter.
 
            - Android Support Library Custom View (UI Component) 
              a module to implement custom views. Part of the Android Support Library.
 
            - Documentfile (UI Component) 
              a library to view a file document.
 
            - Drawerlayout (UI Component) 
              AndroidX library to implement a Material Design drawer widget.
 
            - Android Emoji2 Compat (UI Component) 
              core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters.
 
            - AndroidX Fragment (UI Component) 
              AndroidX library to encapsulate part of the user interface or behavior into reusable components.
 
            - Interpolator (UI Component) 
              AndroidX library to use animation interpolators on older platforms.
 
            - androidx.legacy (Utility) 
              a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
 
            - Lifecycle (Utility) 
              perform actions in response to a change in the lifecycle status of another component, such as activities and fragments.
 
            - Loader (Utility) 
              library to load data for your UI that survives configuration changes.
 
            - AndroidX Local Broadcast Manager (Utility) 
              an application-wide event bus and embraces layer violations in your app: any component may listen events from any other.
 
            - Print (Utility) 
              a library to print photos, docs, and other graphics and images.
 
            - ProfileInstaller (Utility) 
              AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART.
 
            - ResourceInspection (Development Aid) 
              AndroidX library to surface the attributes of custom views in Android Studio’s Live Layout Inspector.
 
            - Recyclerview (Utility) 
              display large sets of data in your UI while minimizing memory usage.
 
            - Android Activity Saved State (Utility) 
              provides the base Activity subclass and the relevant hooks to build a composable structure on top.
 
            - Slidingpanelayout (UI Component) 
              AndroidX library to implement a sliding pane UI pattern.
 
            - Startup (Utility) 
              AndroidX library to implement a straightforward, performant way to initialize components at app startup.
 
            - Swiperefreshlayout (UI Component) 
              implemtation of the swipe-to-refresh UI pattern.
 
            - Tracing (Utility) 
              AndroidX library to write trace events to the system trace buffer.
 
            - Transition (UI Component) 
              animates motion in the UI with starting and ending layouts.
 
            - Vectordrawable (UI Component) 
              AndroidX library to render vector graphics.
 
            - Android Jetpack VersionedParcelable (Utility) 
              Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.
 
            - Viewpager (UI Component) 
              AndroidX library to display Views or Fragments in a swipeable format.
 
            - Webkit (Utility) 
              a static library to use android.webkit APIs that are not available for older platform versions.
 
            - Jetpack WindowManager Library (Utility) 
              enables application developers to support new device form factors and multi-window environments. The library provides a common API surface for API versions 14 and later. Especially provides additional functionality on foldable devices.
 
            - Flutter Permission handler Plugin (Utility) 
              provides a cross-platform (iOS, Android) API to request and check permissions.
 
            - open_file (Utility) 
              a plug-in that can call native APP to open files with string result in flutter.
 
            - Android Swipe Layout (UI Component) 
              helps developers to integrate swiping with your UI component.
 
            - FasterXML Jackson (Utility) 
              a fast and compliant streaming JSON parser/writer with a StAX-like API and support for marshalling/unmarshalling POJOs via annotations.
 
            - FolioReader-Android (Utility) 
              ePub reader and parser framework.
 
            - Android PdfViewer (Utility) 
              library for displaying PDF documents on Android, with animations, gestures, zoom and double tap support.
 
            - Fuel (Utility) 
              HTTP networking library for Kotlin/Android.
 
            - Result (Utility) 
              a tiny framework for modelling success/failure of operations in Kotlin.
 
            - Google Material Design (Utility) 
              library to help with material design guidelines.
 
            - Google Core Libraries for Java 6+ (Utility) 
              a set of core libraries that includes new collection types (such as multimap and multiset), immutable collections, a graph library, functional types, an in-memory cache, and APIs/utilities for concurrency, I/O, hashing, primitives, reflection, string processing, and much more.
 
            - Koi (Utility) 
              lightweight Kotlin library for Android Development.
 
            - File Picker (UI Component) 
              allows to use a native file explorer to pick single or multiple absolute file paths, with extensions filtering support.
 
            - Flutter InAppWebView Plugin (Utility) 
              adds an inline webview, to use an headless webview, and to open an in-app browser window.
 
            - pdfium (Utility) 
              binding to use pdfium library from AOSP.
 
            - OkHttp (Utility) 
              OkHttp is an HTTP+HTTP/2 client for Android and Java applications.
 
            - sqflite (Utility) 
              SQLite flutter plugin.
 
            - Vocsy Epub Viewer (Utility) 
              Flutter package of an epub ebook reader that encapsulates the folioreader framework.
 
            - device_info_plus (Utility) 
               
            - share_plus (Utility) 
               
            - flutter_pdfview (Utility) 
              a PDF viewer library for Flutter.
 
            - Flutter (Development Framework) 
              a cross-platform development kit created by Google, based on the Dart programming language.
 
            - Localization (Utility) 
              Flutter package to simplify in-app translation.
 
            - Flutter Android Lifecycle Plugin (Utility) 
              Flutter plugin to allow other Flutter plugins to access Android Lifecycle objects in the plugin's binding.
 
            - path_provider (Utility) 
              a Flutter plugin for finding commonly used locations on the filesystem.
 
            - url_launcher (Utility) 
              a Flutter plugin for launching a URL.
 
            - Kotlin (Utility) 
              The Kotlin Programming Language
 
            - Kotlin Android Extensions Runtime (Utility) 
              allows to obtain the same experience as with some of these libraries, without having to add any extra code or shipping any additional runtime.
 
            - kotlinx.coroutines (Utility) 
              library support for Kotlin coroutines.
 
            - Kovenant (Utility) 
              an asynchronous library for Kotlin. With extensions for Android, RxJava, JavaFX and much more.
 
            - OkHttp okio Framework (Utility) 
              A modern I/O API for Java to make it much easier to access, store, and process your data.
 
            - Apache Commons (Development Framework) 
              an Apache project focused on all aspects of reusable Java components.
 
            - Webkit Boundary Interfaces (Utility) 
              Chromium WebView helpers
 
            - EventBus (Utility) 
              Android optimized event bus that simplifies communication between Activities, Fragments, Threads, Services, etc.
 
            - IntelliJ IDEA (Utility) 
               
            - Joda Time (Utility) 
              provides a quality replacement for the Java date and time classes.
 
            - jsoup (Utility) 
              a Java library for working with real-world HTML. It provides an API for extracting and manipulating data, using the best of DOM, CSS, and jquery-like methods.
 
            - NanoHTTPD (Utility) 
              a tiny, easily embeddable HTTP server in Java.
 
            - Readium Kotlin Toolkit (Utility) 
              a toolkit for ebooks, audiobooks and comics written in Swift & Kotlin.
 
            - Simple Logging Facade for Java (Utility) 
              abstraction for various logging frameworks (e.g. java.util.logging, logback, log4j) allowing to plug in the desired logging framework at deployment time.
 
            - Spring Framework (Development Framework) 
              comprehensive programming and configuration model for modern Java-based enterprise applications.
 
            - ZeroTurnaround ZIP Library (Utility) 
              library to process even large sets of large ZIP archives.
 
            - Retrofit (Utility) 
              Type-safe HTTP client for Android and Java by Square, Inc.
 
            - Timber (Utility) 
              logger with a small, extensible API which provides utility on top of Android's normal Log class.