Top 20 NuGet extensibility Packages

A simple and reusable primitive for reliably unique identifiers usable in any application.
Extensible aims to make adding extensilbilty points/events easier, using a generic ModuleHost which can load your Modules using a number of 'Loaders'. See the README for some basic usage info or the full working example application here: https://github.com/mrb0nj/Extensible/tree/master/examples
Microsoft VisualStudio XAML Designer Extensibility SDK