Android

Build 100% native Dalvik apps for Android

Silverlight

Build rich web client apps using Silverlight

ASP.NET

Build websites using ASP.NET and MVC

Windows Desktop

Build rich business apps for Windows

Applets & Servlets

Build client and server web apps with Applets & Servlets

iOS

Builds Cocoa Touch apps for iPhone and iPad

JavaServer Pages

Build websites using Tomcat and JavaServer Pages

Windows Phone

Build great apps for Windows Phone 7 and 8

Cross-Platform Servers

Build powerful cross-platform server solutions

Windows Metro

Build touch apps for Windows RT and Metro

Mac

Build native 64-bit Cocoa Apps for OS X

...ands lots more

The Sky is the Limit.
Between .NET, Java and Cocoa, Oxygene is everywhere you want to go.