Top 20 NuGet WPF Packages

Custom wpf styling that looks a bit like material
Bunch of useful controls for fast and smart building helpful WPF-applications with dark style.
Create and show a Modern MessageBox with a single code.
Compact library of MVVM commands. Packet contains RelayCommand, SingleExecutionCommand and SequentialCommand. Examples: https://github.com/Viridovics/AirMVVM#airmvvmcommands
Helper for Single Instance Applications for Windows Forms and WPF
MVVM Framework for WPF
WPF Font Awesome 5.12.0 integration
DependencyProperty黑魔法,Lisp转换器
.NET embeddable video/media player based on mpv for WinForms and WPF
YiSo Translator is a simple app translation plugin, allowing you to add multiple language to your application, tested on Winforms and WPF
System.Waf is a lightweight framework that helps you to create well-structured XAML applications. This package supports writing unit tests of WPF (Windows Presentation Foundation) applications.
Fast Dynamic WPF Localization Framework
A flexible, easy to configure drop-in replacement for the standard WPF Grid control
OLinq is a project to provide a Linq Queryable provider implementation for operating on ObservableCollections or other INotifyCollectionChanged supporting lists. The output of OLinq is an ObservableView which notifies when the results of the query have changed.
Elysium is library that implements Metro style for Windows Presentation Foundation applications.
Collection of WPF themes for DataGrid control plus some additional attached behavior. Together they make DataGrid look and behave like in Silverlight. Available themes: ExpressionLight, ExpressionDark, WhistlerBlue, etc.
A TaskDialog wrapper class with fallback emulator (for XP and earlier).
XText allows you to easily create a text based layout simply in code, including Paragraphs, inlines, formatting etc. Also gives the ability to conditionally writing out elements
Includes only the parts of the original Accordion control in the Microsoft WPF toolkit for use with .NET 4.0 and later.