Top 20 NuGet extensibility Packages

Provides the Common Composition bindings for Windsor.
A pipeline component that wraps a delegate.
A simple plugin system with lazy loading of plugin assemblies.
Microsoft PRISM 4.1 ported to Portable Class Library and Microsoft.Composition. Namespaces are not changed for convenience.
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.
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.
Provides useful extension methods for primitive .Net data types.
Integrates CommonProvider to Castle Windsor Ioc for resolving dependencies.
Provides custom types, helpers and extension methods for Visual Studio extensibility.
A simple library for loading plugins.
A project template for building Library Installer extensions
Helper classes with Visual Studio extension development
CodeJamExtensibility helps you create extensible applications.
A NuGet package which can be used to easily create item and project templates for Visual Studio using the dotnet Template Engine (https://github.com/dotnet/templating).
This package provides additional types and extension methods specifically for using ModulEngine with ASP.NET Core, including simplified configuration and improved logging
An implementation of the Tcl scripting language.