ServiceStack.Text by: Demis Bellot

.NET's fastest JSON, JSV and CSV Text Serializers (3x faster than JSON.NET). Fast, Light, Resilient. Benchmarks at: http://servicestack.net/benchmarks/ Includes the String and Stream functionality for all the ServiceStack projects including: - T.Dump() generic extension method for easy dbugging and introspection of types - WebRequest, List, Dictionary and DateTime extensions

sharpcompress by: Adam Hathcock

SharpCompress is a compression library for .NET/Mono/Silverlight/WP7 that can unrar, decompress 7zip, zip/unzip, tar/untar bzip2/unbzip2 and gzip/ungzip with forward-only reading and file random access APIs. Write support for zip/tar/bzip2/gzip is implemented.

SharpDX by: Alexandre Mutel

Core assembly for all SharpDX assemblies.

SharpDX.D3DCompiler by: Alexandre Mutel

Assembly providing DirectX - D3DCompiler managed API.

SharpDX.Direct2D1 by: Alexandre Mutel

Assembly providing DirectX - Direct2D, DirectWrite and WIC managed API.

SharpDX.Direct3D9 by: Alexandre Mutel

Assembly providing DirectX - Direct3D9 managed API.

SharpDX.DXGI by: Alexandre Mutel

Assembly providing DirectX - DXGI 1.0, 1.1 and 1.2 managed API.

SharpPcap by: Chris Morgan

SharpPcap is a cross-platform(Windows, Mac, Linux) packet capture framework for the .NET environment. It provides an API for capturing, injecting, analyzing and building packets using any .NET language such as C# and VB.NET.

SharpZipLib by: http://www.icsharpcode.net/

#ziplib (SharpZipLib, formerly NZipLib) is a Zip, GZip, Tar and BZip2 library written entirely in C# for the .NET platform. It is implemented as an assembly (installable in the GAC), and thus can easily be incorporated into other projects (in any .NET language).

Should by: Eric Hexter, Tim Scott

The Should Assertion Library provides a set of extension methods for test assertions for AAA and BDD style tests. It provides assertions only, and as a result it is test runner agnostic. The assertions are a direct fork of the xUnit test assertions. This project was born because test runners Should be independent of the assertions!

Shouldly by: Jake Ginnivan, Joseph Woodward, Simon Cropp

Shouldly - Assertion framework for .NET. The way asserting *Should* be

SixLabors.Core by: Six Labors

Low level primitives for use across Six Labors projects..

SixLabors.Fonts by: Six Labors and contributors

A cross-platform library for loading and laying out for processing and measuring; written in C#

SixLabors.ImageSharp by: Six Labors and contributors

A new, fully featured, fully managed, cross-platform, 2D graphics API for .NET

SixLabors.ImageSharp.Drawing by: Six Labor and contributors

An extension to ImageSharp that allows the drawing of images, paths, and text. This is the official release of ImageSharp.Drawing by the Six Labors team who own the ImageSharp codebase.

SixLabors.Shapes by: Scott Williams and contributors

Polygon manipulation/merging and interrogation library. Its a fully manged netstandard library so should work everywhere.

SixLabors.Shapes.Text by: Scott Williams and contributors

Allows generating glyphs for text and a font for manipulation using SixLabors.Shapes

smtpapi by: Brandon West

Easily build SendGrid SMTPAPI headers.

SourceLink.Create.CommandLine by: Cameron Taggart

SourceLink: Source Code On Demand Source Link your Portable PDB files to allow source code to be downloaded on demand

SpecFlow by: SpecFlow Team

SpecFlow aims at bridging the communication gap between domain experts and developers by binding business readable behavior specifications to the underlying implementation. Our mission is to provide a pragmatic and frictionless approach to Acceptance Test Driven Development and Behavior Driven Development for .NET projects today.