Nerdbank 

Stamps your assemblies with semver 2.0 compliant git commit specific version information and provides NuGet versioning information as well.

Streams for full duplex in-proc communication, wrap a WebSocket, split a stream into multiple channels, etc.

A .NET Core Tool that can install, read and set version information based on git history, using Nerdbank.GitVersioning.

Full duplex Stream for in-proc communication between two components.

Package to make writing MSBuild extensions easier that work both with MSBuild Core and MSBuild (Full).

Provides QR code encoding and decoding functions.

OAuth 1.0 Consumer portable class library targeting .NET Framework 4.5, Windows Phone 8 and Windows 8.

Algorithms such as branch and bound.

A .NET library for Zcash, capable of creating accounts, deriving addresses, interacting with lightwallet servers, syncing, and sending transactions.

A .NET library for cryptocurrencies, capable of several commonly-used algorithms.

A .NET library for Bitcoin, capable of several commonly-used algorithms.

A CLI tool with commands to help maintain .NET codebases.

A fast and more user-friendly MessagePack serialization library for .NET. With ground-up support for trimming and Native AOT.