An advanced, composable, functional reactive model-view-viewmodel framework for all .NET platforms that is inspired by functional reactive programming. ReactiveUI allows you to  abstract mutable state away from your user interfaces, express the idea around a feature in one readable place and improve the testability of your application.

MIT License

ReactiveUI

The automatic type-safe REST library for .NET Core, Xamarin and .NET. Heavily inspired by Square's Retrofit library, Refit turns your REST API into a live interface.

refit

An opinionated HTTP library for Mobile Development

Fusillade

splat

An asynchronous, persistent key-value store created for writing desktop and mobile applications, based on SQLite3. Akavache is great for both storing important data as well as cached local data that expires.

Akavache

C# Fody extension to generate RaisePropertyChange notifications for properties and ObservableAsPropertyHelper   properties.

ReactiveUI.Fody