• C Flow 

Abstracts C function calls and declarations from a C source file and produces a listing of the program's calling hierarchy.  This utility will operate on any file which ends in the suffix ".c".  It will generate a new  file with the original file name plus the suffix ".flw" which contains a  sequential indented list of all functions called from each function declaration.

It is a useful utility for understanding the overall flow and calling structure of a program, particularly one that has insufficient or no documentation or commenting.