BrandonKeyes 

XRS is a service layer for Xamarin.Realm that provides threadsafe auto-increment support for primary keys, data-changing events, and an extensible API for working with RealmObjects.

Atlas is a small library that provides viewmodel-first navigation, event-based automatic page-caching, navigation-stack saving, and some other useful services (multi-arg messaging service, page-dialog... More information

Provides extension methods for INotifyPropertyChanged to raise the PropertyChanged event and reduce boilerplate code.