Top 20 NuGet add-in Packages

Extensibility library.
A .NET Core Global Tool for hosting Microsoft Office Add-ins during development
Visual Studio Extensions development SDK
Kraken is a set of open source libraries for SharePoint development. The package includes code for writing provider hosted apps, including CSOM utilities.
XAML Styler is a visual studio extension, which formats XAML source code by sorting the attributes based on their importance. This tool can help you/your team maintain a better XAML coding style as well as a much better XAML readability.
Serilog logging wrapper for Add-in X
CSOM extensions to send SMS to Single or Multiple users of your SharePoint Online Site. Select user(s) by SharePoint Group or Username/Email or SharePoint User Object or SharePoint FieldUserValue(Person or Group column value(s)). Utilizes SharePoint Add-in: SMS Gateway Connector (SMS Via SharePoint ...
CSOM extensions to send SMS to Single or Multiple users of your SharePoint Online Site. Select user(s) by SharePoint Group or Username/Email or SharePoint User Object or SharePoint FieldUserValue(Person or Group column value(s)). Utilizes SharePoint Add-in: SMS Gateway Connector (SMS Via SharePoint ...
Log4Net logging wrapper for Add-in X.
Implementation for the WPF helper for Excel-DNA - Add-in X
Wrapper for the inversion of control container Autofac - Add-in X
This add-in gives you your own dashboard with items you recently worked on in your Visual studio editor. Provides a Quick and handy way to navigate to these items and manage them. It is applicable to code files, TFS tasks, etc. Recently Used Files is supported for Visual Studio 2010 and 2012.
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
Interface for the wrapper of inversion of control - Add-in X
Interface for the WPF helper method - Add-in X
Interface that will be used for the logging wrapper used by Add-in X
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.
Implementation of the fluent ribbon buider for Excel Add-in. We recommend to add the AddinX.Ribbon.ExcelDna package to use the fluent ribbon with Excel-DNA.
A library that provides simplified threaded and non-threaded execution of SQL statements. It can be used to expose an interface to Microsoft Excel clients, providing threaded, async operations to a single-thread application.
Code shared between Captain and its add-ins