Top 20 NuGet themes Packages

Light Theme for Xamarin Forms applications
Dark Theme for Xamarin Forms applications
Build native UIs for iOS, Android, and Windows Phone from a single, shared C# codebase
Styles implementing AdonisUI's theme definitions to provide classic look and feel.
Core theme definitions for AdonisUI - a lightweight UI toolkit for WPF applications offering classic but enhanced windows visuals
An Avalonia UI Framework theme editor view models.
Bootswatch is a collection of free themes for Twitter Bootstrap. Check it out at bootswatch.com.
jQuery UI is an open source library of interface components � interactions, full-featured widgets, and animation effects � based on the stellar jQuery javascript library . Each component is built according to jQuery's event-driven architecture (find something, manipulate it) and is themeable, making...
Themes for CodeMirror http://codemirror.net/demo/theme.html
Simply modified it to work with AvalonDock v2.9. Usage: <xcad:DockingManager.Theme> <vs2013:Vs2013DarkTheme /> </xcad:DockingManager.Theme>
5 Skins. https://github.com/VitalickS/BrightSharp.Toolkit
This provides theme related classes for Scissorhands.NET application.
Collection of basic themes for WPF. Supported controls: Calendar, Button, CheckBox, RadioButton, ScrollBar, ListBox, Expander, ComboBox, ProgressBar, TextBox, PasswordBox, RichTextBox, Label, Menu, MenuItem, Separator, TabControl, Slider, TreeView, ToggleButton, GroupBox, ListView, ListViewItem, Too...
ExpressionDark theme for WPF. Supported controls: Calendar, Button, CheckBox, RadioButton, ScrollBar, ListBox, Expander, ComboBox, ProgressBar, TextBox, PasswordBox, RichTextBox, Label, Menu, MenuItem, Separator, TabControl, Slider, TreeView, ToggleButton, GroupBox, ListView, ListViewItem, ToolBar, ...
A WPF theme which will make an application look like Blend
Take a look at https://cssvariableshim.azurewebsites.net and try it out there.
jQuery UI is an open source library of interface components — interactions, full-featured widgets, and animation effects — based on the stellar jQuery javascript library . Each component is built according to jQuery's event-driven architecture (find something, manipulate it) and is themeable, making...
jQuery UI is an open source library of interface components — interactions, full-featured widgets, and animation effects — based on the stellar jQuery javascript library . Each component is built according to jQuery's event-driven architecture (find something, manipulate it) and is themeable, making...
jQuery UI is an open source library of interface components — interactions, full-featured widgets, and animation effects — based on the stellar jQuery javascript library . Each component is built according to jQuery's event-driven architecture (find something, manipulate it) and is themeable, making...
jQuery UI is an open source library of interface components — interactions, full-featured widgets, and animation effects — based on the stellar jQuery javascript library . Each component is built according to jQuery's event-driven architecture (find something, manipulate it) and is themeable, making...