Top 20 NuGet Silverlight Packages

Xamarin.Forms implementations for the general DarkHelpers library
Lightweight ViewModel-First MVVM framework for Xamarin.Forms. With ZenMvvm you can use a ViewModel-First pattern while keeping the power and familiarity of Xamarin Forms. The result? More readable and maintainable code, and a stronger separation of concerns.
MvvmScarletToolkit.Observables is part of the MvvmScarletToolkit framework, containing opinionated base classes for viewmodels of the MVVM pattern.
Useful MVVM extensions to C# objects and classes in WPF, UWP, Xamarin, and MAUI.
Commons and data modeling library for the Tortuga project.
Application Insights Tracing module for DotVVM
Redbridge Xamarin Forms MVVM portable client SDK library
Dapplo.CaliburnMicro.Security brings security to Dapplo.CaliburnMicro
A MVVM filtering framework.
Since there is no SharedSizeGroup property for the Silverlight Grid I decided to code that myself. It is really helpful if you design a page with multiple Grids on it.
My package description.
Plupload is a JavaScript API for dealing with file uploads it supports features like multiple file selection, file type filtering, request chunking, client side image scaling and it uses different runtimes to achieve this such as HTML 5, Silverlight and Flash.
Package Description
A small opinionated MVVM library
MVVM and CQRS Toolkit for W81/WPA81/UWP/.NET Core 1.0/.NET 4.5 apps
Reuse is a toolkit that makes easier for you to implement specific MVVM and cross-platform patterns that you reuse oftenly across Windows Phone and Windows Store apps. Built using the building blocks of MVVM Light and leveraging as much as possible Portable Class Libraries.
A small, simple event aggregator implementation for .NET, SL, WP7, WP8, WinRT, Mono and Unity3d.
The core components Microsoft Silverlight Toolkit. Details at http://silverlight.codeplex.com
Combined power of MahApps.Metro and Caliburn.Micro
Command-line tools for DotVVM.