1. Acr Xamarin FormsCamera/Gallery, Barcode Scanning, User Dialogs, Geo-Location, Network Utils, Device Info, Settings, E-Mail, Phone, SMS all for Xamarin.Forms
2. NotificationsLocal notifications for iOS, Android, & Windows. Includes badges, scheduled notifications, sounds, & context actions
3. HttptransfertasksCross Platform HTTP Transfers for downloading and uploading (supports background operations)
4. JobsBackground Jobs Framework for Xamarin & UWP
5. SettingsA cross platform settings plugin for Xamarin and Windows. Unlike other setting libraries in the wild, this library provides several unique features. Store almost any object, monitor change events, iOS app groups, iCloud Provider, and Old school windows settings
6. UserdialogsA cross platform library that allows you to call for standard user dialogs from a core .net standard library, Actionsheets, alerts, confirmations, loading, login, progress, prompt, toast... async just for fun
7. BluetoothleEasy to use, cross platform, REACTIVE BluetoothLE Plugin for Xamarin
8. geofencesCross platform geofencing library that works on iOS, Android, and Windows