Top 20 NuGet XAMARIN Packages

Native markdown rendering for Xamarin.Forms.
Provides Observable-based events API for common UI controls/eventhandlers. The contents of this package is automatically generated, please target pull-requests to the code generator.
Light Theme for Xamarin Forms applications
Dark Theme for Xamarin Forms applications
Build native UIs for iOS, Android, and Windows Phone from a single, shared C# codebase
NuGet package of the Syncfusion Xamarin compression assembly. Note: This package needs to be installed in all Xamarin.Forms projects (PCL, Android, iOS and UWP).
Flexible button control for Xamarin.Forms
Easily Create Awesome Slideover's in Xamarin.Forms
Glide is a fast and efficient open source media management and image loading framework for Android that wraps media decoding, memory and disk caching, and resource pooling into a simple and easy to use interface.
Definitely Fastest and Zero Allocation JSON Serializer for C#(NET, .NET Core, Unity, Xamarin).
A Xamarin Forms control to render the native video player on every platform.
Behaviors for Xamarin.Forms .NET Standard 1.3/2.0
A simple caching library to cache any data structure for a specific amount of time in any .NET application. Additionally, offers simple HTTP methods for caching web request data.
Style XamarinForms-apps with Css
Simple Http Listener -.NET Standard Library Great for a simple http implementation. For example as a building block for UPnP device or client implementation.
Movesense API for Xamarin
Wapps.Forms - Extension for Xamarin.Forms.
Windows 10 UWP implementation of Bluetooth Low Energy library. Scan for advertisements and beacons, connect to devices, read/write/notify/indicate, all with a simple async API. Complete readme & sample application:
A Xamarin Android binding for Wdullaer Material Datetime Picker. Supports Android 4 (API 15) and greater. Includes a material design themable timepicker and datepicker
Xamarin.Forms.Maps Renderer for WPF