FreeFileSync
FreeFileSync is a free Open Source software to synchronize files and synchronize folders available for Windows, Linux and Mac OS X.
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
FreeFileSync is a free Open Source software to synchronize files and synchronize folders available for Windows, Linux and Mac OS X.
Free Open Source Mac OS X Windows Linux Debian CentOS Ubuntu openSUSE
The only automated sync, back-up, collaboration and file management service powerful enough for a business user and easy enough for a novice. Secure, anywhere access to your files.
Freemium Mac OS X Windows Android iPhone iPad Web
Allway Sync is a file and folder synchronization software for Windows.
Freemium Windows
Create Synchronicity is a nice, lightweight backup program with a very user-friendly - yet powerful - interface, that synchronizes files and folders extremely quickly (it can even recognize paths such as "MyUSB"\MyFolder, and...
Free Open Source Windows
ChronoSync can synchronize, backup, and create bootable backups to almost anything you can connect to your Mac: select cloud services, other Macs, NAS drives, external drives, PC's or anything you can mount as a volume.
Commercial Mac OS X
DirSync Pro (Directory Synchronize Pro) is a small utility for file and folder synchronization without bidirectional file-deletion. DirSync Pro can be used to synchronize the content of one or many folders recursively.
Free Open Source Mac OS X Windows Linux
FolderSync enables simple and automatic sync to cloud based storage to and from local folders on the device memory card. It currently support multiple SkyDrive, Dropbox, SugarSync, Ubuntu One, Box.
Freemium Android Android Tablet Kindle Fire
SyncFolders helps you to synchronize the contents of two folders, including any subfolders, track file modifications and deletions in a local database, propagate deletions and detect file renames, which is a noteworthy feature.
Free Windows
DSynchronize is a stand-alone utility that let you periodically synchronize two or more folders on Hard Disk, Floppy Disk, LAN, USB Key, CD-DVD (with packet writing software) and FTP server.
Free Windows
Automatically backup files, directories, even entire drives! Karens Replicator copies selected files from one drive/folder to another. Source and Destination folders can reside anywhere on your network.
Free Open Source Windows
Powerful folders and archives synchronization tool. Built-in support for zip archives and FTP. Can be used as backup tool, for folders comparison, and for CDRW verification. Produces HTML reports and printout of folders comparison result.
Commercial Windows
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.
Commercial Windows