Top 20 NuGet text Packages

The Semantic Logging Application Block provides a set of destinations to persist events published by a subclass of EventSource, This add-on packages adds support to persisting log entries into rolling text files and simple text files.
Xamarin and Windows plugin to perform text to speech functionality. Adjustable pitch, speak rate, locale, and more.
Aylien Text API library for .NET
This is an add-on NuGet package for BoboBrowse.Net. It provides the ability to configure FacetHandlers using XML in each Lucene.Net index directory so the facet handlers don't need to be configured in code.
A utility class based on https://github.com/srkirkland/Inflector for manipulating text
NHibernate Search build against NHibernate 4.0.4.4000 and Lucene 3.0.3
CSharpQuery is a fast, internationalized, multi-threaded, full text search engine. It supports thesaurus lookup, diacritic and cyrillic characters, result ranking, standardized word breaking, and more. It's extremely easy to get up and going; simply add the key/values during indexing and get the key...
SMTP mailing service using DotLiquid as templating engine, supporting poco viewmodels as well as anonymous objects.
Aspose. OCR Cloud is a simple ocr technology, which you can use in your application to convert image to text. Add OCR to your app with simply few line of code. Any language, any platform, no hardware resources. Automatic skew correction and advanced automative image pre-processing: Aspose.OCR...
NHibernate Search brings the power of full text search engines to the persistence domain model by combining NHibernate with the capabilities of the Lucene.Net search engine.
Zero overhead FastQuery for Sqlite. Fork of an early version of Microsoft.Data.Sqlite.
Package Description
TextDiscovery HtmlAgilityPack implementations of IDomInterpreter, IDomNodeFactory, and IHtmlConverter. Enables the following capabilities: mark search hits in the DOM, create HTML excerpts at a given word count with configurable element-breaking rules, and more.
PSWebApi is a simple library for turning PowerShell Scripts or batch/executable files into ASP.NET Web APIs (RESTful Services) out of the box. See details in https://github.com/DataBooster/PS-WebApi.
A different beautiful Floating Edit Text for Xamarin.Android.
Algorithms related to text processing
An editable, multi-language, event-driven textbox for MonoGame that supports selection and cut/copy/paste. Just import this nuget package. It is a PCL so you should be able to use it in any MG project. Look at the git-repo for the usage since the repo there contains a test-project.
Having an image and a catalog of text tags, Imagnr gives you a library to do a cognitive search based on the text appearing in the image. Uses Levenshtein distance algorithm over condensed OCR text to calculate similarity of tags.