Microsoft Silverlight
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Microsoft Silverlight

Developer(s) Microsoft Corporation
Initial release April 2007; 3 years ago
Stable release 4.0.51204.0 (December 15, 2010; 6 days ago) [+/?]
Preview release [+/?]
Operating system Microsoft Windows, Mac OS X, Linux and Symbian OS[1][2]
Type Web application, Application framework
License Freeware
Website silverlight.net
Microsoft Silverlight is an application framework for writing and running rich Internet applications with emphasis on multimedia, animations, and graphics, with features and purposes similar to those of Adobe Flash. The run-time environment for Silverlight is available as a plug-in for most web browsers. While early versions of Silverlight focused on streaming media, current versions support multimedia, graphics and animation, and give developers support for CLI languages and development tools.
The current version 4 was released in April 2010.[3] It is compatible with multiple web browsers used on Microsoft Windows and Mac OS X operating systems. Mobile devices, starting with Windows Phone 7 and Symbian (Series 60) phones, were expected to become supported in 2010.[4][5] A free software implementation named Moonlight, developed by Novell in cooperation with Microsoft, is available to bring most Silverlight functionality to Linux, FreeBSD and other open source platforms.