Silverlight for Linux: a free plugin.
Linux can now enjoy Silverlight-enabled websites using a Firefox plugin called “Moonlight”. It is an open source implementation of Microsoft Silverlight for Unix systems. With Moonlight, you can access videos, applications, and content specially made to tap the Silverlight technology.
What is Moonlight?
“Moonlight was built by Novell in collaboration with Microsoft which provided Novell with test suites, specifications, open source code and Media Codecs to create an entirely open sourced Silverlight-compatible implementation for Unix systems. “ – Moonlight
Download Moonlight plugin for Firefox here.