Eastrall 

A plugin for Microsoft.EntityFrameworkCore to add support of encrypted fields using built-in or custom encryption providers.

Provides a simple WrapLayout for Xamarin.Forms applications.

Sylver.HandlerInvoker is a .NET Core library that provides a mechanism to invoke actions just like ASP.NET Core MVC controllers.

LiteNetwork is a simple and fast networking library built with C# and compatible with .NET Standard 2. Its main goal is to simply the creation of basic socket servers over the TCP/IP protocol. It has been initialy developed for game development networking, but can also be used for other purposes.