Top 20 NuGet programming Packages

A dynamic scripting language for .NET.
A F# library for creating and solving Linear Programming and Mixed Integer Programming Models
An F# library for syntactically nice construction of DateTime and TimeSpan objects.
An F# library for syntactically nice construction of DateTime and TimeSpan objects, backed by NodaTime.
The P Programming Language Compiler
The AForge.Genetic library contains classes to run Genetic Algorithms (GA), Genetic Programming (GP) and Gene Expression Programming (GEP). Set of chromosome and selection classes are provided. Full list of features is available on the project's web site.
Contains chromosome and selection classes to create Genetic Algorithms (GA), Genetic Programming (GP) and Gene Expression Programming (GEP). This package originated from the AForge.NET Framework and is now part of the Accord.NET Framework.
Implementation of monadic type holding a returned value or an error code.
This Library provides a way for doing Railway Oriented Programming in C#.
RazorEngine.Roslyn - Roslyn support for RazorEngine.
Code2Xml is a parser collection that inter-converts source code and XML-based concrete syntax trees (CSTs) supporting multiple programming languages.
Implementation of validation of a ResultType.
Provides an extensible abstraction layer for unit tests.
SNAP makes AOP easy by integrating with your favorite IoC container. SNAP does not modify compiled code (unlike PostSharp) . It uses your IoC container to create runtime-callable wrappers to intercept your method calls. Source code for SNAP is hosted at http://github.com/Acoustic/Snap
A utility library for programming functionally in C#
The defensive programming framework helping programmers to easily validate method input.
Infusio is strongly typed Infusionsoft API client with a functional DSL.