Top 20 NuGet custom-view Packages

Xamarin.Android bindings for turkergoksu's PercentageView.
The ShowcaseView library is designed to highlight and showcase specific parts of apps to the user with a attractive and flat overlay.
A menu of FloatingActionButton items, designed to be anchored on an AppBarLayout
Xamarin.Android Binding for Hammad Akram's Sneaker v2. A lightweight Android library for customizable alerts
Simple and Customizable Gauge / Speedometer Control for Android
Lets you create joystick with some customization for Xamarin.Android
Configurable Custom Crop widget for Xamarin.Android
Library to add ImageView (ImageBadgeView) with a badge like notification count.
Xamarin.Android Binding for Pierfrancesco Soffritti's Sliding Panel. An Android sliding panel that is part of the view hierarchy, not above it
Android loading view library
A Passcode view for Android
Android layout to show template for loading, empty, error etc. states. To do that all you need to is wrap the target area(view) with StatefulLayout.
Yet another implementation of Floating Action Button for Android with lots of features.