Top 20 NuGet commandline Packages

Helper classes for command line app
Provides a command line only selectable menu.
Convention based argument handling for console applications.
NClap is a .NET library for parsing command-line arguments and building interactive command shells. It's driven by a declarative attribute syntax, and easy to extend.
Parse and escape command lines
==DEPRECATED== Source moved/split into several repositories/packages: https://www.nuget.org/packages/CSharpTest.Net.Collections/ https://www.nuget.org/packages/CSharpTest.Net.Commands/ https://www.nuget.org/packages/CSharpTest.Net.RpcLibrary/ https://www.nuget.org/packages/CSharpTest.Net.Tools/ ...
Simple attribute based command line parser.
Command line application utility package. Provides API for parsing and binding command line arguments to .NET methods.
A convention based command line automatic parser.
FluentValidations extension for MatthiWare.CommandLineParser
Simpler than other Config Providers, access settings by SimplerConfig.SConfig.Instance["key:subkey"]
Parse command-line args directly into your POCOs with a simple, yet complete and elegant fluent API
The gflags package contains a library that implements commandline flags processing. As such it's a replacement for getopt(). It has increased flexibility, including built-in support for C++ types like string, and the ability to define flags in the source file in which they're use...
Micro-framework for .NET console application. Cocona makes it easy and fast to build console applications on .NET.
Lightweight version of Cocona. Micro-framework for .NET console application. Cocona makes it easy and fast to build console applications on .NET.
Core component for Cocona. Micro-framework for .NET console application.
Cauldron.Consoles is a Cauldron.Core based parameter parser which supports grouping of parameters in execution groups. It is also supports localization and has a nice parameter table :) Breaking changes in 3.1.x - See https://github.com/Capgemini/Cauldron for more information.
Terse syntax C# command line parser for .NET with F# support. The Command Line Parser Library offers to CLR applications a clean and concise API for manipulating command line arguments and related tasks.
Library providing functionality to help when creating .NET Console applications.