Top 20 NuGet addin Packages

Open-source Excel add-in in C#/.NET4.0 that makes matrix, vector and most importantly, table-valued functions of Finaquant Calcs available for Excel users and programmers. Based on ExcelDNA and NetOffice
Make Application easily pluggable
NUnit features a fluent assert syntax, parameterized, generic and theory tests and is user-extensible. This package includes the NUnit 3.0 framework assembly for .NET Compact Framework 3.5, which is referenced by your tests. You will need to install the NUnitLiteCF package in order to run the tests...
Interface for the WPF helper method - Add-in X
Sparx Enterprise Architect Addin router to load addin code specific to repository
AspNet.Core.SharePoint.Addin.Authentication
Helper classes with Visual Studio extension development
Tools for development of SOLIDWORKS add-ins
Bind Cake arguments to classes via Attributes
Use the interop implementation of the virtual dom for creating VSTO addins.
Adds common guidelines to cake-contrib projects.
Cake addin to update the license header of source code files.
Convention based Cake scripts for building IntelliJ plugins.
Cake add-in that makes ExcelDnaPack available as a tool in Cake.
Cake addin for easy creation of GitHub releases.
Fluent ribbon builder for Excel-DNA. It simplifies the creation of the ribbon with Excel-DNA so you don't have to write XML or to create the callback methods.
Using the Tenon.IO api, gives the ability to run accessibility tests for both URL's and source code.
Asp.Net Owin middleware for SharePoint Add-ins for Asp.Net MVC 5
Strong Typed controls using the IWebElement methods, but only exposing the functions required for each control type.
Cake addin for OpenCoverToCoberturaConverter