File Replicator is a nifty, sparse, little--and free--utility which can be of great use to anyone who has a lot of duplicate copies of the same file scattered hither and yon across their hard drive. This can be a set of default data, a "Readme" which is the same for many different programs, a license agreement, or many other things.
Using File Replicator, you can pick one version of this file (ideally, the latest) and set the program scurrying through your hard disk, finding all other copies of the file. It can then replace them all with your chosen version. File Replicator includes many safeguards to keep you from accidentally stomping on the wrong thing--you choose a root folder for the search, you can choose to search only and not replace, and before you replace, you're shown a list of the files to be replaced.
File Replicator can be useful in corporate environments to make sure that all copies of an important document--for example, HR policies or vacation schedules--are up-to-date.