1. PunchclockMake sure your asynchronous operations show up to work on time
2. AkavacheAn 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.
4. ReactiveuiAn 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.
6. RefitThe 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.
7. FusilladeAn opinionated HTTP library for Mobile Development
8. SextantA ReactiveUI navigation library for Xamarin.Forms