ChristianFindlay 

Cross Platform REST Client for all C# platforms Samples and Info: https://github.com/MelbourneDeveloper/RestClient.Net - Open Source. (MIT License) - Markup language agnostic. (Supports JSON, Binary, SOAP and other markup languages) - Use strong types with REST. - Supports Android, iOS, Windows... More information

Hid.Net Cross platform Hid (USB) library. Enumerate Hid (USB) devices and read and write to/from them. Supports .NET, Android, and UWP out of the box. Other platforms can be added

SQLite .NET Standard Library - Beta Please clone this repo for samples: https://github.com/MelbourneDeveloper/SQLite.Net.Standard.git All platforms supported. Including -iOS -NET -Android -UWP

A cross platform library for communicating with the Satoshi Labs' Trezor Hardware Wallet Supports Android, UWP, .NET Core and .NET Framework with Hid.Net. Support for other platforms can be added with Hid.Net dependency injection

A cross platform C# library for the Ledger hardwarewallet. To see the samples, please clone the repo at the project Url.

Cross platform C# library for talking to connected devices in a uniform way through dependency injection.

A cross platform USB library written in C#

A cross platform library for communicating with the KeepKey hardwarewallet Supports Android, UWP, .NET Core and .NET Framework with Hid.Net. Support for other platforms can be added with Hid.Net dependency injection

Cross platform, base C# library for all Hardwarewallets. Provides simple interfaces that sit underneath all hardwarewallet libraries, and utilitiy classes that sit over the top all libraries

Cross platform C# library for general Crypto Currency functionality, and communicating with Cryptocurrency exchanges, and Blockchain APIs.

Device.Net based library for USB access on Linux, MacOS and Windows. Use Usb.Net, and Hid.Net for Windows, UWP, and Android support. The base interfaces are the same so the code is compatible on all platforms.