Silver Designer is a designer project in C# / Silverlight and looks like Adobe InDesign Lite. It gives just the basic functionality and runs in the browser. Demo

At this link http://titan830.startdedicated.com/Silverdesigner/ there is a working instance of the Silver Designer. It is always the last version of the product and available on web. Try and use it, have fun. What is Silverlight

It is a plugin like Adobe Flash created by Microsoft. Silverlight applications runs in browser like client applications. Necessary languages C# / XAML. Get Started Silverlight from here http://msdn.microsoft.com/en-us/silverlight/bb187358.aspx

Also there is more details about it https://silverdesigner.codeplex.com/