haXe

haXe (pronounced as hex) is an open source programming language. While most of the other languages are bound to their own platform (Java to the JVM, C# to .Net, ActionScript to the Flash Player), haXe is a multiplatform language. It means that you can use haXe to target the following platforms : Javascript : You can compile a haXe program to a single .js file. You can access the typed browser DOM

[syake07]

Javascript, PHP, C++, C#, Java に出力できる言語。

[tyru]

Javascript, Flash, NekoVM(?), PHP, C++にコンパイルできるプログラミング言語。C#とJavaも(コンパイルできる言語として)視野に入れてるらしい。