CTC++/TestWell: from Olavi Poutanen, add-On for Test Coverage Analyzer for C/C++. Comercialware.
Code coverage allow you to test your code in a methodic way and ensure that you follow the requested procedures before delivering your software. By having integrated the tool into BC your productivity will boost. Very recomended.
CMT++/TestWell: metric your software and report generator. (I will enhace the report soon).