http://compositewpf.codeplex.com/
Http://silverlight.codeplex.com/releases
OpenSource porject:
1. Siverlight ToolKit (opensource)
Http://www.codeplex.com/Silverlight
Add: Silverlight Toolkit March changes
2. GOA ToolKit for Silverlight (Opentsource)
Http://www.netikatech.com/downloads
3. Silverlight Contrib (opensource)
http://silverlightcontrib.codeplex.com/
4. Silverlight Extension (Opentsource)
http://slextensions.net/
5. Silverlight FX (opensource)
http://projects.nikhilk.net/SilverlightFX/
6. SilverLight Blacklight (opensource)
Http://blacklight.codeplex.com/Release/ProjectReleases.aspx
7. Visifire for Charts (opensource)
http://www.visifire.com/
Third party Controls:
1. ComponentOne
http://www.componentone.com/SuperProducts/StudioSilverlight/Live+Examples/
2. Devexpress
http://demos.devexpress.com/Silverlight/
3. Infragistics
Http://www.infragistics.com/dotnet/netadvantage/silverlight/line-of-business.aspx#Overview
4. Telerik
Http://www.telerik.com/products/silverlight.aspx
5. Componentart
http://silverlight.componentart.com/
6. divelements
http://www.divelements.co.uk/
Silverlight Open source projects and third-party control collection