Xunit.SkippableFact by: Andrew Arnott

Make your Xunit test methods self-determine to report a "skipped" result. Useful for such cases as "not supported on this platform" results or other environmental inputs.

YamlDotNet by: Antoine Aubry

A .NET library for YAML. YamlDotNet provides low level parsing and emitting of YAML as well as a high level object model similar to XmlDocument.

ZedGraph by: ZedGraph Project

ZedGraph is a class library, user control, and web control for .net, written in C#, for drawing 2D Line, Bar, and Pie Charts. It features full, detailed customization capabilities, but most options have defaults for ease of use.

Zeroconf by: Oren Novotny

Bonjour support for .NET Standard, .NET 4.5, .NET Core, Xamarin, Windows Phone, Windows Store/UWP