:book: Favorite Android Library

Best Android Library open source on GitHub and others, enjoy !!

android-library-visual

Summary

CircularProgressBar : Realize a circular ProgressBar in the simplest way possible.
BetterPickers : BetterPickers for easy input selection
CircularImageView : Realize a circular ImageView in the simplest way possible
CircularFillableLoaders : Realize a beautiful circular fillable loaders
ShowcaseView : Highlight the best bits of your app
View Animations : Easily apply common animations
ImageSlider : Animated image transitions
Forsquare-CollectionPicker : Item Picker which looks like Foursquare Tastes picker
Iconify : Easily embed icons into your app
GooglePlusLayout : Custom layout that support playing animation on child view in the main Layout that appears on the main page (Like Google + App)
TimesSquare : Standalone Android widget for picking a single date from a calendar view
CircularSeekBar : A circular seek bar for Android
DateTimePicker : Contains a beautiful DatePicker and TimePicker (Like Google Agenda App)

ListViewAnimations : Easy way to animate ListView items (Like Google Keep App)
QuickReturn : Reveal or hide a header or footer as the list is scrolled in a direction (Like Facebook, Twitter or Google + App)
QuickReturn : Implementation of the QuickReturn UI developed
Picasso : A powerful image downloading and caching library

AndEngine : AndEngine is a free Open Source 2D OpenGL Game Engine for the Android platform
Unity3D : Very good (available on Android, iOS, Web, Windows, OS X)
Ogre3D : The best open source 3d engine but it is a large framework
Irrlicht : Good performance, light framework [Game: Moblox]
Linderdaum Engine : Open source for Windows and Android
Cocos2d-x : Open source cross platform
Box2d : Fast and easy
Jbox2d : So slow on Java that I made a JNI wrapper with SWIG to use native box2d (AndEngine does the same)
Chipmunk : Fast but I prefer box2d
Bullet : Excellent 3D engine

Retrofit : Type-safe HTTP client for Android and Java by Square, Inc.
Gson : Gson is a Java library that can be used to convert Java Objects into their JSON representation
SimpleXML : Simple is a high performance XML serialization and configuration framework for Java
Jsonschema2pojo : Generate Plain Old Java Objects from JSON or JSON-Schema

MaterialViewPager : Material Design ViewPager easy to use library
Material-Movies : Setup an android environment to develop an scalable, maintainable and testable projects
Android-ObservableScrollView : Android library to observe scroll events on scrollable views
Android-Material-Examples : Sample for Android Material Design

ZXing : Barcode or QR scanner
WebServer : Android Web Server (with NanoHTTPD)
Mupdf : PDF Reader
Cropper : Image cropping tool
EventBus : Simplifies communication between different parts of your application
ActiveAndroid : ActiveAndroid is an ORM for Android
ButterKnife : Field and method binding for Android views which uses annotation processing to generate boilerplate code for you

ActionBarStyleGenerator : Allows you to easily create a simple, attractive and seamless custom action bar style for your Android application
AssetStudio : Icon generators allow you to quickly and easily generate icons from existing source images, clipart, or text
TinyPNG : Advanced lossy compression for PNG images that preserves full alpha transparency
LayoutFinder : Layout Finder helps you create the code that ties your Android UI and Java code together
ButtonMaker : Online tool to generate buttons code for Android Apps
Gradle, Please : It helps you to get exact maven artifact of the particular library
Postman : It comes handy when you would want to check your rest APIs
Material-design-icons : Material design icons are the official icon set from Google
Video-to-gif : Create un perfect demo Gif with your screencast

####References