Silverlight (CLR) animation test
Silverlight (WPF/e) vs DHTML vs Flash (Flex) vs WPF vs Apollo vs Java (Swing)

Home Silverlight (JavaScript) Silverlight (CLR) DHTML Flex Flex (cached) Java (Swing)

Also check out XBAP (XAML Browser Application) - requires IE on Vista or XP with .NET 3.0 Installed

start | stop # of balls: Resize balls as 1/sqrt(N)

Silverlight 2 version of this demo.