Nirvana Web Client APIs
The Nirvana Adobe Flex API is an Adobe ActionScript API allowing the rapid development of publish/subscribe RIA clients. These clients can be run within a browser, or as standalone Adobe AIR applications:
The Nirvana Silverlight API is an C# .NET API allowing the rapid development of publish/subscribe RIA clients. These clients can be run within a browser:
The Nirvana Java client APIs can be used for standalone Java applications, but can also be used in the browser as either Applets or Java Webstart applications.
See Nirvana's Language API Comparison Grid for an overview of basic differences between each API.