The Adobe Flash Platform is the leading web design and development platform for creating expressive applications, content, and video that run consistently across operating systems and devices and reach over 98% of Internet-connected desktop users. The Flash Platform consists of an integrated set of technologies - including client runtimes, tools, frameworks, services, and servers - that provide everything you need to deliver applications, content, and high-definition video to the widest possible audience.
Silverlight is a powerful development tool for creating engaging, interactive user experiences for Web and mobile applications. Silverlight is a free plug-in, powered by the .NET framework and compatible with multiple browsers, devices and operating systems, bringing a new level of interactivity wherever the Web works.