Top 20 NuGet extensibility Packages

High-level, composable and testable APIs for working with IDEs.
A simple library for loading plugins.
An Autofac extension to Rhyous.SimplePluginLoader.
Extensibility library.
A NuGet package which can be used to easily create item and project templates for Visual Studio.
Lightning fast MEF engine, supporting System.ComponentModel.Composition and System.Composition.
Diverse, the Fuzzer pico library you need to make your .NET tests more *Diverse*
Reference assemblies for Visual Studio Project System Extensibility
The MEF attributes and runtime classes in the .NET Managed Extensibility Framework (MEF) that are used for imports and exports, and exception types, in a .NET Standard compliant NuGet package form, as found in the System.ComponentModel.Composition namespace.
An implementation of the Tcl scripting language.
Visual Studio Project System Extensibility
Common targets to create version-aware Visual Studio extensions easily.
An implementation of the Tcl scripting language.
Build tools used for building extensions to the Visual Studio project system.
Provides the Common Composition bindings for Ninject.
An implementation of the Tcl scripting language. This package contains the MSBuild tasks and PowerShell cmdlets that enable integration [with Eagle] as well as the command-line shell [for Eagle].
The Composition Analysis Tool (Mefx) is a command-line application that analyzes library (.dll) and application (.exe) files containing Managed Extensibility Framework (MEF) parts. The primary purpose of Mefx is to provide developers a way to diagnose composition failures in their MEF applications w...
The Del Sole's VSIX library helps generating code snippets for Visual Studio 2015 and Visual Studio Code, plus it allows creating VSIX packages to share reusable IntelliSense code snippet files for Visual Studio 2015 and Visual Studio Code. We provide integrated Roslyn code analysis for live issue d...
Provides custom types, helpers and extension methods for Visual Studio extensibility.
Portable component composition annotations, dependency injection framework agnostic. Automatically register your application components by convention with the most popular DI frameworks, while keeping your code container-agnostic.