Microsoft Silverlight is a web application framework that provides functionalities similar to those in Adobe Flash, integrating multimedia, graphics, animations and interactivity into a single runtime environment. Initially Silverlight was released as a video streaming plug-in, later version brought additional interactivity features and support for .NET languages and development tools. It is compatible with multiple web browser products used on Microsoft Windows, Linux (using Novell Moonlight), and Mac OS X operating systems.