
Foldermatch
FolderMatch is a program that compares directories and files, showing the differences clearly. -Easily, quickly, and reliably compare and synchronize two folders, two drives, or two computers.
DirSync is a directory synchronisation tool, which can also be used for backupping data.
DirSync is an intuitive backup tool that can be run without installation. By comparing source and target files, only required files are copied, which greatly increases the working speed. By using multiple jobs, it is possible to perform complex data backups.
DirSync can work with drive serial number instead of drive letters.
portable file-synchronization folder-sync