Codeprofiler is a project mainly written in C++ and C, it's free.
Cross platform static class to provide high precision function/statement level profiling in c++.
/* Version: 0.78 Release Date: 5/10/2011
Created by Jonathan Annas 3/11/09 and released under GPL v2.
Description: The code profiler is meant to be used to time functions or operations at runtime with the best possible precision. It uses high precision timers for both Windows and Linux to provide time profiles for any statement.
Notes: The output times should be considered relative to each other. The absolute values of the runtimes may be affected by the OS command process timer which may add some constant time to your profile. */