Phoronix: CLDOC: A Clang-Based C/C++ Document Generator

CLDOC is a document generator for C and C++ projects to create documentation automatically out of comments as well as creating XML-based descriptions of the API. CLDOC is a new project but already sounds promising and is being powered by LLVM's Clang C/C++ front-end for its parser...

http://www.phoronix.com/vr.php?view=MTI5OTk