Top 20 NuGet toolkit Packages

Microsoft Cognitive Toolkit Libraries, CPU-Only Build
Xwt is a cross-platform UI toolkit for creating desktop applications with .NET and Mono that run on multiple platforms from the same codebase. Xwt works by exposing one unified API across all environments that is mapped to a set of native controls on each platform. The framework consists of the fr...
IconPacks for stylish awesome WPF and UWP applications.
Extended WPF Toolkit is the number one collection of WPF controls, components and utilities for creating next generation Windows applications. Provides 48 controls, all offered under the Microsoft Public License for maximum freedom. v3.6.0 provides 36 bug fixes and improvements. Documentation, sourc...
The goal of MahApps.Metro is to allow devs to quickly and easily cobble together a 'Modern' UI for their WPF apps (>= .Net 4.5), with minimal effort.
ControlzEx is a library with some shared Controls for WPF.
Fluent.Ribbon is a library that implements an Office-like user interface for the Windows Presentation Foundation (WPF). It provides controls such as RibbonTabControl, Backstage, Gallery, QuickAccessToolbar, ScreenTip and so on.
An easy to use drag'n'drop framework for WPF applications.
Microsoft Cognitive Toolkit Libraries, GPU Build
Brings the functionality of the Windows.Devices.Geolocation APIs cross-platform with support for Windows, Android and iOS.
Brings the functionality of the Windows.Storage APIs cross-platform with support for Windows, Android and iOS.
Brings the functionality of the Windows.Storage.Pickers APIs cross-platform with support for Windows, Android and iOS.
Brings the functionality of the Windows.Media.Capture APIs cross-platform with support for Windows, Android and iOS.
Xamarin.Essentials: a kit of essential API's for your apps
Azure components for Pip.Services in .NET
Brings the functionality of the Windows.System.Launcher APIs cross-platform with support for Windows, Android and iOS.
Remove procedure calls for Pip.Services in .NET
Brings the functionality of the Windows.ApplicationModel APIs cross-platform with support for Windows, Android and iOS.
Brings additional extensions to the Windows APIs cross-platform with support for Windows, Android and iOS.
Brings the functionality of the Windows.System.Display APIs cross-platform with support for Windows, Android and iOS.