rofiqsetiawan 

ShimmerLayout can be used to add shimmer effect (like the one used at Facebook or at LinkedIn) to your Android application. Beside memory efficiency even animating a big layout, you can customize the behaviour and look of the animation.

Xamarin.Android Binding for Relex's Circle Indicator. A lightweight ViewPager indicator like in Nexus 5 launcher.

A menu of FloatingActionButton items, designed to be anchored on an AppBarLayout

Convert your TextView in ExpandableTextView with added options ReadMore/ReadLess.

Xamarin.Android Binding for Hammad Akram's Sneaker v2. A lightweight Android library for customizable alerts

A sweet message box designed for Android developers.

A fast circular ImageView perfect for profile images. This is based on RoundedImageView from Vince Mi which itself is based on techniques recommended by Romain Guy.

🔥 custom view pull to refresh. Support ScrollView, ListView, RecyclerView, WebView, and all another views, easy to use

Xamarin.Android lib to show horizontal progress like Instagram Stories

Library of Tweet UI (https://docs.fabric.io/android/twitter/tweet-ui.html) TweetMediaView component.

A simple animation with tanslation or scale views for Xamarin.Android.

Create Android Circular ProgressBar in the Simplest Way

A Material design back port of Android's CalendarView

Another floating action button menu with expand/collapse behavior. Demo available on https://github.com/rofiqsetiawan/OneMoreFabMenuDemo

Xamarin.Android Bindings for David Rawson's Spinner DatePicker, a styleable DatePicker for Android using the old spinner style (NumberPickers)

This light-weight library provides images with letter/text like the Gmail app. It extends the Drawable class thus can be used with existing/custom/network ImageView classes. Also included is a fluent interface for creating drawables and a customizable ColorGenerator.

Telegram and WhatsApp-like download progress indicator for Android

An HTTP & HTTP/2 client for Android and Java applications

Xamarin.Android binding for Square Okio, a modern I/O API for Java

Xamarin.Android Binding for Kotlin Standard Library for JVM (org.jetbrains.kotlin:kotlin-stdlib). Note: This is an "EmbeddedReferenceJar". It will not generate any Android Callable Wrappers (ACW) and C# API.