Top 20 NuGet add-in Packages

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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.
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Code shared between Captain and its add-ins
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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.
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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.
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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
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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.