Top 20 NuGet parsing Packages

Terse syntax C# command line parser for .NET. For FSharp support see CommandLineParser.FSharp. The Command Line Parser Library offers to CLR applications a clean and concise API for manipulating command line arguments and related tasks.
The C# target of the ANTLR 4 parser generator for Visual Studio 2010+ projects. This package supports projects targeting .NET 2.0 or newer, and built using Visual Studio 2010 or newer.
The runtime library for parsers generated by the C# target of ANTLR 4. This package supports projects targeting .NET 2.0 or newer, and built using Visual Studio 2008 or newer.
Command-line parsing API. A community-maintained fork of Microsoft.Extensions.CommandLineUtils, plus extras. Commonly used types: McMaster.Extensions.CommandLineUtils.CommandLineApplication McMaster.Extensions.CommandLineUtils.CommandOption McMaster.Extensions.CommandLineUtils.IConsole McMaster.Ext...
The C# target of the ANTLR 4 parser generator for Visual Studio 2010+ projects. This package supports projects targeting .NET 2.0 or newer, and built using Visual Studio 2010 or newer.
Class library that defines a script language and an object abstraction of computable elements. The library helps application parse and execute script. Script is extensible, and it is easy for modules to extend the script engine.
Parse, generate or validate EDI documents.
A natural language date parser for .Net. A port of Ruby's chronic.
The runtime library for parsers generated by the C# target of ANTLR 3. This package supports projects targeting .NET 2.0 or newer, and built using Visual Studio 2008 or newer.
Human name parsing. Parses names using English conventions for persons names. Many thanks to Tyler Young, Matt Gillette, mguiness.
Parse, generate or validate EDI documents.
Turn unstructured HTML pages into structured data. The OpenScraping library can extract information from HTML pages using a JSON config file with xPath rules. It can scrape even multi-level complex objects such as tables and forum posts.
An easy to use library for parsing files.
Reads and writes CSV, fixed-length and other flat file formats with a focus on schema definition, configuration and speed. Supports mapping directly between files and classes.
Split name into military rank, honorific, first name, middle initial, last name, suffix, gender. Also matches names.
Command-line argument parser.
A wrapper to run css-to-xpath on .net with Jint
A .net wrapper for the ua-parser library
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.
Provides CsvParser and serialization for SharpLearning.