Smooth Streaming is described as 'An IIS Media Services extension, enables adaptive streaming of media to Silverlight and other clients over HTTP. Smooth Streaming provides a high-quality viewing experience that scales massively on content distribution networks, making true HD 1080p media' and is an app. There are more than 10 alternatives to Smooth Streaming for a variety of platforms, including Linux, Windows, Mac, Self-Hosted and BSD apps. The best Smooth Streaming alternative is MediaGoblin, which is both free and Open Source. Other great apps like Smooth Streaming are AVideo, Adobe Media Server, Red5 Open-source and MistServer.