The Silverlight 5 Toolkit theming core package. You must add specific theme assemblies separately. Packaged by Singulink (www.singulink.com) as apparently no more love is being shown by Microsoft for Silverlight :(
Ljund Controls contains Windows 8 themeing for WPF and helpers for animation of controls such as fading in/out, resizing, sliding and more.
In addition to these core features, a TextEntryDialog is provided, and a helper for navigation between pages in a WPF Frame.
WindowsThemeListener is a library that listens to all modern Windows theming and color settings, e.g. Windows 10. With this nifty library, your .NET applications can now easily employ the current Windows theme mode and accent colors as applied across all modern Windows apps.