This is equivalent to the following find(1) command:
find dir -type f -mtime +offset -print
I.e. scan the directory tree dir for regular files that are older than offset, and write out their names. However, while find(1) only lets you specify the time offset as a number of days, this program lets you narrow it down to hours, minutes, or seconds.
See the manual entry for more details.
ACME Labs / Software / find_old_files