Silverlight

Microsoft Silverlight is a programmable web browser plug-in that allows you to add multimedia, animation, vector graphics, interactivity, and audio/video playback to your web pages. Designed primarily for those who program interactive and/or animated graphics for web pages, it is a programming environment. Windows 7 comes with an opening slideshow that was done in Silverlight and demonstrates some of the features of this application.

Silverlight lets you play back WMV, WMA, and MP3 content on supported Windows and Mac OSx browsers without requiring Windows Media Player, the Windows Media Player ActiveX control, or the Windows Media browser plug-ins. In Silverlight applications, user interfaces are declared in XAML and programmed using a subset of the .NET Framework. You can use XAML for creating vector graphics and animation. Text created with Silverlight is searchable and indexable by search engines.