Top 20 NuGet functional Packages

Yet another implementation of an option/optional type for .NET. An Optional type explicitly represents the type of a value that may or may not exist. While you can do this with nulls, that has many drawbacks. Some of the benefits of this library over some others include comprehensive equality supp...
DiscriminatedUnion AutoMap Helper.
Fast and space efficient immutable collections, hash maps, and utilities for performant programming in C#. Split from the DryIoc: https://github.com/dadhi/DryIoc
A simple and easy to use option type for C#.
Rabbit link astral markup to service schema
Rabbit link astral contracts implementation
Types and parsers for working with the HTTP State (Cookies) specification in RFC 6265
Testing utilities and helpers for Freya libraries, plus Freya applications
Testing utilities and helpers for Freya libraries, plus Freya applications
Polyfill for Kestrel based server implementations
Polyfill for Kestrel based server implementations
Freya Optics for access to HTTP state/cookies extension properties of requests and responses
Freya Optics for access to HTTP state/cookies extension properties of requests and responses
Freya Optics for access to Patch extension properties of requests and responses
Freya Optics for access to core HTTP properties of requests and responses
Freya Optics for access to CORS extension properties of requests and responses
A Freya machine expressing the core HTTP semantics and logic
Core utilities and tools for building Freya machines
Batteries-included Freya Stack