Patch Creator for Windows

The description of Patch Creator - Play With New Friends

The Patch Creation utility creates self-contained & (optionally) password & compressed patches for files already on the end-users machine. Use it, for example, to update registered users of your software. Only registered users will be able to use the patches created using this program since the files on the machine are used to create the updated version. Updates to different versions of the same named files can be included in a single patch.