C::Sharp is a parser and Lexer for C# Programming Language.
This module distribution contains (or will contain, when it's finished) a tokeniser, parser and, hopefully, compiler for C#. C# is Microsoft's new programming language for its .NET endeavour.
It bears more than a passing resemblence to Java. Like Java, it's relatively easy to implement the basics of it but the power is in the runtime.
Implementing C# in Perl is the first step to making Perl the preferred .NET Common Language Runtime for Open Source Programmers. See also, however, the Mono project at Ximian.com.