JamesMontemagno 

Check to see if your users have granted or denied permissions for common permission groups on iOS and Android. Additionally, you can request permissions with a simple cross-platform async/awaitified API.

Settings Plugin for Xamarin and Windows provides a consistent, cross platform settings/preferences plugin. This makes it easier to create cross-platform .NET apps and have cross platform settings. Manage and use all settings from one PCL/NetStandard library and save natively on each... More information

Easly access geolocation across Xamarin.iOS, Xamarin.Android, and Windows.

Get network connectivity information such as network type, speeds, and if connection is available. Additional functionality includes the ability to ping a specific host and port number. Ensure you have proper permissions set by reading the README.

Provides a simple solution for getting access to the current Activity of the application when developing a Plugin for Xamarin. This will lay down a base "application" class for developers in their Android application with boilerplate code to get them started.

Xamarin and Windows plugin to perform text to speech functionality. Adjustable pitch, speak rate, locale, and more.

Take or pick photos and videos from a cross platform API.

Custom control for your Xamarin.Forms project ot turn your images into elegant circle images. Customizable border thickness and color. Ensure you call ImageCircleRenderer.Init() on each platform! Built against: 3.0.0.446417

Receive information about the device that you are using. Properties such as Model, Operating System, Version, Id, and even the ability to generate a unique Id for your application based off of these properties.

Messaging plugin for Xamarin and Windows to make a phone call, send a sms or send an e-mail using the default messaging applications on the different mobile platforms.

Collection of MVVM Helpers such as ObservableRangeCollection, BaseViewModel, Grouping, and others.

Share Plugin for Xamarin and Windows to share text, link, copy text to clipboard, or open a browser.

Open external maps to navigate to a specific geolocation or address. Option to launch with navigation option on iOS as well.

Add Pull to Refresh to ScrollView or group a ListView. See Project for more details Ensure you call PullToRefreshLayoutRenderer.Init() on each platform! Built against: 3.6.0.220655

Android floating action button that can react to scrolling events. Becomes visible when an attached target is scrolled up and invisible when scrolled down.

A fast circular ImageView for Xamarin.Android perfect for profile images.

The local notification plugin provides a simple, cross-platform way to show local notifications from within Xamarin and UWP apps.

Toolkit for Xamarin.Forms (Controls, Behaviors, and Converters)!

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.

Xamarin and Windows Plugin to In-App Billing. Get item information, purchase items, and restore purchases with a cross-platform API. Read the full documenation on the projects page.