WPF Controls for Modern, High-Performance Windows Apps | Syncfusion
WPF Controls - Visual Studio Marketplace
NOV UI Controls- WPF | Nevron
WPF Custom Controls - Without The Pain - CodeProject
FREE IG Theme for WPF and Silverlight Microsoft Controls - Brian Lagunas
FREE Metro Light and Dark Themes for WPF and Silverlight Microsoft Controls - Brian Lagunas
GitHub - lepoco/wpfui: WPF UI provides the Fluent experience in your known and loved WPF framework. Intuitive design, themes, navigation and new immersive controls. All natively and effortlessly.