Add sticker assets

README.md

@@ -26,7 +26,7 @@ The following assets are currently available:
 | [Polly](/polly)<br/><a href="/polly/Polly-Logo@4x.png"><img src="/polly/Polly-Logo@4x.png" width="250px"/></a> | Polly logo for supporters of the [Polly library](http://github.com/app-vnext/Polly/) |
 | [Reactive Extensions](/reactive-extensions)<br/><a href="/reactive-extensions/Logo_Color_300x300.png" width="250px"><img src="/reactive-extensions/Logo_Color_300x300.png" width="300px"/></a> | Reactive Extensions icon for supporters of the [Rx.NET project](https://github.com/Reactive-Extensions/Rx.NET). |
 | [Reactive UI](/reactiveui)<br/><a href="/reactiveui/reactiveui.png" width="250px"><img src="/reactiveui/reactiveui.png" width="300px"/></a> | ReactiveUI logo for supporters of the [ReactiveUI project](https://reactiveui.net). |
-| [Xamarin](/xamarin)<br/><a href="/xamarin/Xamagon/png/Xamagon.png" width="250px"><img src="/xamarin/Xamagon/png/Xamagon.png" width="300px"/></a> | [Xamarin](http://xamarin.com) logo for supporters of mobile development with .NET. |
+| [Xamarin](/xamarin)<br/><a href="/xamarin/Xamagon/png/Xamagon.png" width="250px"><img src="/xamarin/Xamagon/png/Xamagon.png" width="300px"/></a> | [Xamarin](http://xamarin.com) logo for supporters of the [Xamarin platform](https://xamarin.com) for iOS, Android, tvOS, watchOS, and macOS development with .NET. |
 | [WiX Toolset](/wix)<br/><a href="/wix/wix-white.png"><img src="/wix/wix-white.png" width="250px"/></a> | WiX Toolset logo for supporters of the [WiX Toolset](http://wixtoolset.org/) |
 
 ## Contributing

xamarin/README.md

@@ -0,0 +1,37 @@
+# Xamarin
+
+## Xam·a·rin
+
+*noun*
+
+is an open source mobile platform enabling developers to craft beautiful cross-platform applications for iOS, Android, tvOS, watchOS, and macOS. Developers build these apps using the modern programming languages C# and F# inside of the world class IDE Visual Studio and Visual Studio for Mac. In addition, developers have the ability to share code across all .NET platforms, leverage existing libraries, and access to 100% of the native APIs.
+
+## Logo
+
+Here's our beloved logo and Xamagon, provided in various formats for your design needs. Please display the logo as is, without any modifications.
+
+| Icon | PNG | SVG | PDF |
+|------------|-----|------|--------|
+| <img src="Xamarin/png/Xamarin logo.png" height="250px" alt=""/> | <a href="Xamarin/png/Xamarin logo.png" target="_blank" download="Xamarin logo.png">PNG</a> | <a href="Xamarin/svg/Xamarin logo.svg" target="_blank" download="Xamarin logo.svg">SVG</a> | <a href="Xamarin/pdf/Xamarin logo.pdf" target="_blank" download="Xamarin logo.pdf">PDF</a> |
+| <img src="Xamagon/png/Xamagon.png" height="250px" alt=""/> | <a href="Xamagon/png/Xamagon.png" target="_blank" download="Xamagon.png">PNG</a> | <a href="Xamagon/svg/Xamagon.svg" target="_blank" download="Xamagon.svg">SVG</a> | <a href="Xamagon/pdf/Xamagon.pdf" target="_blank" download="Xamagon.pdf">PDF</a> |
+
+<a href="assets/xamarin-logos.zip" class="more" download="Xamarin logos.zip">Download all versions</a>
+
+## Spacing Considerations
+
+<img src="assets/spacing.png" width="400px" alt=""/>
+
+Leave a healthy margin around our logo so it has room to breathe. Also, please don't combine our logo with other graphics.
+
+## Colors
+
+These are the main colors we use for Xamarin, with blue being our signature shade. The others should be used sparingly as accents.
+
+![Swatches](assets/swatches.png)
+
+* Blue: #3498db
+* Green: #77d065
+* Purple: #b455b6
+* Dark Blue: #2c3e50
+
+<a href="assets/xamarin-color-swatches.zip" class="more" download="Xamarin color swatches.zip">Download color swatches</a>