A parser generator derived from ANTLR with JavaCC like (but not the same) syntax and some new features. It also comes with sample grammars for CSharp, Java, GnuC, Html, XHtml, Xml, ECMA262... etc.
Not C Sharp. Four goals: 1. Create a CSharp compiler written in C# and CUP Parser Generator. 2. Learn how to write a compiler. 3. Encourage compiler experimentation by anyone who is interested.