My request is for a utility that will execute a given command in the starting directory, and also in all sub-directories in that directory. A very simple example of usage:
Crawler "C:\Code" "Dir *.c"
Will list all C source code files in C:\Code, and in all sub-directories. This example isn't even necessary, as "Dir" will do it for you, but you can see how useful it could be when you use a more meaningful command.