Boo is a new object oriented programming language for the CommonLanguageInfrastructure underlying DotNet and the MonoProject.

http://boo.codehaus.org/

It has a syntax near identical to PythonLanguage (including features planned for Python 3.0), but Boo is a statically typed language.  It does most of its work at compile-time instead of at run-time, although there are run-time features such as DuckTyping.  As such, feature-wise Boo actually has more in common with CsharpLanguage, such as static typing (by default), (optional) explicit typing: "private x as int", interfaces, events, abstract classes, delegates, enums, properties, operator overloading, etc.  

Additional features include:

* AnonymousMethod''''''s/LexicalClosure''''''s (see http://boo.codehaus.org/Closures )
* explicit type declarations ("x as int") are optional (uses TypeInference)
* compile directly to a cross-platform exe or dll assembly
* support for custom macros and attributes (similar to decorators in python)
* advanced features for extending the compiler and the language itself.
* DuckTyping, and more runtime typing features planned
* CaseInsensitive option
* A Boo add-in for the free SharpDevelop IDE

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CategoryProgrammingLanguage, CategoryDotNet