A simple way to create a syntax highlighting editor for a custom language/grammar and/or create custom grammar parsers. This is a .NET project written in C#. See details here: http://acct001.com/wordpress/?p=190
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.