Microsoft's Silverlight

Microsoft has announced details of their competitor to Flash -- and to JavaScript, and to ... It's called Silverlight.

To me the most interesting thing about it is that it allows developers to build browser-side web apps using Python and Ruby instead of JavaScript.

Silverlight apps can use a subset of the .NET framework. Embedded video can run at HD revolutions up to 1280x720.

It all looks pretty interesting. It'd be more interesting if it provided a 3D API; but so far I see no evidence of that.