Compare Files is a small utility, originally developed for personal use, that compares the contents of two directories to determine which files and folders from one directory are not in the other. It also compares file time stamps to detect modified files.
Compare Files is very easy to use. There are toolbar buttons to launch Windows Explorer to either the first or second folder. You can also open a selected file or directory to check its contents. Selecting a file or directory in one list automatically matches up the corresponding file or directory in the second list.