By loading colordoc on top of a documentation file (that uses Frank Mittelbach's doc package), the code listings will highlight pairs of curly braces with matching colors. Other delimiters like \if ... \fi, are highlighted, as well as the names of new commands. It makes code a little more readable, and it helps when you're writing it. Three options, including a non-color option designed for printing (which numbers the delimiters and underlines the new commands). License: lppl